Company lists · Data refreshed September 2026
Top 25 Diamond certification companies worldwide
RevenueBase identified 1,987 company matches for diamond certification companies worldwide as of September 2026 and tracks 23,759 professional contacts across them, including 4,215 with verified work emails. India is the largest market and Mumbai the largest hub.
This list covers company matches for diamond certification companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026. Country and city lists for diamond certification companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest diamond certification companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,052 contacts → | ||||
Exact match “KIRAN GEMS is the World’s Largest Manufacturer of Natural Diamonds and India’s Premier Diamantaire, establishing benchmarks not just for sheer scale of operations, but also for…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 858 contacts → | ||||
Exact match “Blue Nile was founded in with the idea that the diamond and engagement ring business was ready for innovation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 467 contacts → | ||||
Exact match “Rosy Blue is one of the most renowned diamond and jewelry companies in the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 415 contacts → | ||||
Exact match “Dharmanandan Diamonds, widely known as DDPL is a prominent natural diamond manufacturing company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 394 contacts → | ||||
Exact match “IGI, a Blackstone portfolio company, is the world’s largest independent provider of gemological services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 370 contacts → | ||||
Exact match “Zen Pırlanta- Türkiye’nin pırlanta uzmanı- 1890’lara uzanan köklü geçmişe sahip bir marka- Türkiye’nin en çok tercih edilen pırlanta markası- Avrupa ve Ortadoğu’nun en büyük…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 275 contacts → | ||||
Exact match “Founded in 1996 with a mission to delight customers with exceptional products and superior service, Kama Jewelry has firmly established itself among the top ten diamond jewelry…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 267 contacts → | ||||
Exact match “As pioneers in the jewellery industry, we are well-known for our high quality, reliability, and prompt customer service.We have a global footprint and collaborate with brands from…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 249 contacts → | ||||
Exact match “OUR HERITAGE: The Asian Star group represents a rich heritage of values, skills and experience, amassed over five decades in the diamond industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 248 contacts → | ||||
Exact match “Established in 1972, Laxmi Diamond is one of the leading diamond manufacturers, with its footprints spread across the globe.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 234 contacts → | ||||
Exact match “HRD Antwerp is the leading authority when it comes to Diamond Grading, Jewellery Grading and Education.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 225 contacts → | ||||
Exact match “Established in 1962, Goldstar is a trusted name in the diamond and jewellery industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 204 contacts → | ||||
Exact match “The Rapaport Group is an international network of companies providing first class, added value services that support the development of free, fair, efficient and competitive…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 199 contacts → | ||||
Exact match “Dimexon Diamonds Ltd, with sales offices in all 4 corners of the globe, is one of the world’s leading diamond manufacturers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 195 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 175 contacts → | ||||
Exact match “Peace of mind, Assured.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 168 contacts → | ||||
Exact match “Founded in 2016 by a former BCG consultant frustrated with his own engagement ring buying experience, Rare Carat began with a mission to make diamond buying more transparent for…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 166 contacts → | ||||
Exact match “HEARTS ON FIRE® is a modern diamond jewelry brand renowned for the beauty of its signature cut diamonds.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 160 contacts → | ||||
Exact match “Gemological Science International (GSI) is one of the largest gemological laboratories with 13 offices in the United States, India, UAE, Hong Kong and Thailand.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 144 contacts → | ||||
Exact match “Blue Diamond, 2004 yılında toptancı bir firma olarak, mücevher sektörüne pırlanta tedarik etmek ve sektörü pırlanta konusunda eğitmek amacıyla kuruldu.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 126 contacts → | ||||
Exact match “A dream company started by three visionaries; Arvind Shah, Arun Shah and Dilip Shah in 1985, was then strengthened by Vasant Shah, Pravin Shah and Dilip Soni, bringing together…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 126 contacts → | ||||
Exact match “Bafleh Jewellery is one of the leading wholesale jewellery company in UAE.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 122 contacts → | ||||
Exact match “For over six decades, Kapu Gems has been more than a manufacturer.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 111 contacts → | ||||
Exact match “Founded by Keith Leclerc in 1981, International Diamond Center began as a jewelry wholesaler.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 109 contacts → | ||||
Exact match “Suashish Diamonds Ltd.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “diamond certification companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,987 diamond certification companies worldwide
See the full list, filter by size, metro and specialty, and access 4,215 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Diamond certification companies worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for diamond certification companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “diamond certification companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 4,215 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Diamond certification companies by location
12 lists · largest firstEvery Diamond certification companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Diamond certification companies based in India544
- Diamond certification companies based in the United States404
- Diamond certification companies based in the United Kingdom72
- Diamond certification companies based in Belgium70
- Diamond certification companies based in the United Arab Emirates53
- Diamond certification companies based in Hong Kong51
- Diamond certification companies based in Australia46
- Diamond certification companies based in Israel38
- Diamond certification companies based in Thailand28
- Diamond certification companies based in Switzerland26
Cities
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “diamond certification companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many diamond certification companies are there worldwide?
RevenueBase identified 1,987 company matches for diamond certification companies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Kiran Gems Private Limited tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most diamond certification companies?
India leads with 544 companies, followed by the United States (404) and the United Kingdom (72). Every diamond certification companies list by country and city is linked on this page.
Which city has the most diamond certification companies?
Mumbai leads with 179 company records, followed by New York (165) and Surat (153).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,215 professional contacts with verified work emails tracked across these 1,987 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,987 diamond certification companies worldwide. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 diamond certification companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,987 matching company records for diamond certification companies worldwide, with 23,759 tracked contacts and 4,215 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 diamond certification companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Kiran Gems Private Limitedkirangems.com HQ: Mumbai, IndiaReported employees: 10001+ | Mumbai, India | 10001+ | Exact match | 1,052 contacts → |
“KIRAN GEMS is the World’s Largest Manufacturer of Natural Diamonds and India’s Premier Diamantaire, establishing benchmarks not just for sheer scale of operations, but also for…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Blue Nilebluenile.comHQ: New York, NY, United StatesReported employees: 501-1,000 | New York, NY, United States | 501-1,000 | Exact match | 858 contacts → |
“Blue Nile was founded in with the idea that the diamond and engagement ring business was ready for innovation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Rosy Bluerosyblue.com HQ: Antwerp, BelgiumReported employees: 5,001-10,000 | Antwerp, Belgium | 5,001-10,000 | Exact match | 467 contacts → |
“Rosy Blue is one of the most renowned diamond and jewelry companies in the world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Dharmanandan Diamonds Pvt. LTDddpl.com HQ: Mumbai, IndiaReported employees: 5,001-10,000 | Mumbai, India | 5,001-10,000 | Exact match | 415 contacts → |
“Dharmanandan Diamonds, widely known as DDPL is a prominent natural diamond manufacturing company.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | HQ: New York, NY, United StatesReported employees: 501-1,000 | New York, NY, United States | 501-1,000 | Exact match | 394 contacts → |
“IGI, a Blackstone portfolio company, is the world’s largest independent provider of gemological services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  ZEN Pırlantazenpirlanta.comHQ: Bahçelievler / Istanbul, TürkiyeReported employees: 201-500 | Bahçelievler / Istanbul, Türkiye | 201-500 | Exact match | 370 contacts → |
“Zen Pırlanta- Türkiye’nin pırlanta uzmanı- 1890’lara uzanan köklü geçmişe sahip bir marka- Türkiye’nin en çok tercih edilen pırlanta markası- Avrupa ve Ortadoğu’nun en büyük…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Kama Jewelrykamajewelry.comHQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 275 contacts → |
“Founded in 1996 with a mission to delight customers with exceptional products and superior service, Kama Jewelry has firmly established itself among the top ten diamond jewelry…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Uni-Designunidesign-jewel.com HQ: Mumbai, IndiaReported employees: 501-1,000 | Mumbai, India | 501-1,000 | Exact match | 267 contacts → |
“As pioneers in the jewellery industry, we are well-known for our high quality, reliability, and prompt customer service.We have a global footprint and collaborate with brands from…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Asian Star Company Limitedasianstargroup.comHQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 249 contacts → |
“OUR HERITAGE: The Asian Star group represents a rich heritage of values, skills and experience, amassed over five decades in the diamond industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Laxmi Diamond Pvt. LTDlaxmidiamond.com HQ: Surat, IndiaReported employees: 5,001-10,000 | Surat, India | 5,001-10,000 | Exact match | 248 contacts → |
“Established in 1972, Laxmi Diamond is one of the leading diamond manufacturers, with its footprints spread across the globe.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HRD Antwerphrdantwerp.com HQ: Antwerp, BelgiumReported employees: 201-500 | Antwerp, Belgium | 201-500 | Exact match | 234 contacts → |
“HRD Antwerp is the leading authority when it comes to Diamond Grading, Jewellery Grading and Education.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Goldstar Jewellerygoldstarjewellery.comHQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 225 contacts → |
“Established in 1962, Goldstar is a trusted name in the diamond and jewellery industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Rapaportrapaport.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 204 contacts → |
“The Rapaport Group is an international network of companies providing first class, added value services that support the development of free, fair, efficient and competitive…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Dimexon Diamondsdimexon.com HQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 199 contacts → |
“Dimexon Diamonds Ltd, with sales offices in all 4 corners of the globe, is one of the world’s leading diamond manufacturers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Mullermuller.be HQ: Zoutleeuw, BelgiumReported employees: 501-1,000 | Zoutleeuw, Belgium | 501-1,000 | Exact match | 195 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 | SGL Labssgl-labs.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 175 contacts → |
“Peace of mind, Assured.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Rare Caratrarecarat.comHQ: New York City, NY, United StatesReported employees: 51-200 | New York City, NY, United States | 51-200 | Exact match | 168 contacts → |
“Founded in 2016 by a former BCG consultant frustrated with his own engagement ring buying experience, Rare Carat began with a mission to make diamond buying more transparent for…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Hearts On Fireheartsonfire.comHQ: Hong KongReported employees: 201-500 | Hong Kong | 201-500 | Exact match | 166 contacts → |
“HEARTS ON FIRE® is a modern diamond jewelry brand renowned for the beauty of its signature cut diamonds.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Gemological Science International GSIgemscience.net HQ: Manhattan, United StatesReported employees: 51-200 | Manhattan, United States | 51-200 | Exact match | 160 contacts → |
“Gemological Science International (GSI) is one of the largest gemological laboratories with 13 offices in the United States, India, UAE, Hong Kong and Thailand.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Blue Diamondbluediamond.com.tr HQ: İstanbul, TürkiyeReported employees: 1,001-5,000 | İstanbul, Türkiye | 1,001-5,000 | Exact match | 144 contacts → |
“Blue Diamond, 2004 yılında toptancı bir firma olarak, mücevher sektörüne pırlanta tedarik etmek ve sektörü pırlanta konusunda eğitmek amacıyla kuruldu.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Ankit Gemsankitgems.comHQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 126 contacts → |
“A dream company started by three visionaries; Arvind Shah, Arun Shah and Dilip Shah in 1985, was then strengthened by Vasant Shah, Pravin Shah and Dilip Soni, bringing together…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Bafleh Jewellerybafleh.comHQ: Deira, United Arab EmiratesReported employees: 201-500 | Deira, United Arab Emirates | 201-500 | Exact match | 126 contacts → |
“Bafleh Jewellery is one of the leading wholesale jewellery company in UAE.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Kapu Gemskapugems.com HQ: Mumbai, IndiaReported employees: 501-1,000 | Mumbai, India | 501-1,000 | Exact match | 122 contacts → |
“For over six decades, Kapu Gems has been more than a manufacturer.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  International Diamond Centershopidc.comHQ: Clearwater, FL, United StatesReported employees: 51-200 | Clearwater, FL, United States | 51-200 | Exact match | 111 contacts → |
“Founded by Keith Leclerc in 1981, International Diamond Center began as a jewelry wholesaler.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Suashish Diamonds Limitedsuashish.com HQ: Mumbai, IndiaReported employees: 201-500 | Mumbai, India | 201-500 | Exact match | 109 contacts → |
“Suashish Diamonds Ltd.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,987 company matches
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Diamond certification companies: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,973 records in the displayed employee bands.
14 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,987 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Diamond certification companies by location
12 lists · largest firstEvery Diamond certification companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Diamond certification companies based in India544
- Diamond certification companies based in the United States404
- Diamond certification companies based in the United Kingdom72
- Diamond certification companies based in Belgium70
- Diamond certification companies based in the United Arab Emirates53
- Diamond certification companies based in Hong Kong51
- Diamond certification companies based in Australia46
- Diamond certification companies based in Israel38
- Diamond certification companies based in Thailand28
- Diamond certification companies based in Switzerland26
Cities
Questions about this company list
What does Exact match mean for diamond certification companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many diamond certification companies did RevenueBase find worldwide?
The saved snapshot records 1,987 matching company records, 23,759 tracked contacts and 4,215 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 diamond certification companies worldwide. Snapshot: September 19, 2026. https://revenuebase.ai/companies/browse/diamond-certification-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 diamond certification companies worldwide
RevenueBase records 1,987 matching company records for diamond certification companies worldwide, with 23,759 tracked contacts and 4,215 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 diamond certification companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Kiran Gems Private Limitedkirangems.com HQ: Mumbai, IndiaReported employees: 10001+ | Mumbai, India | 10001+ | Exact match | 1,052 contacts → |
“KIRAN GEMS is the World’s Largest Manufacturer of Natural Diamonds and India’s Premier Diamantaire, establishing benchmarks not just for sheer scale of operations, but also for…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Blue Nilebluenile.com HQ: New York, NY, United StatesReported employees: 501-1,000 | New York, NY, United States | 501-1,000 | Exact match | 858 contacts → |
“Blue Nile was founded in with the idea that the diamond and engagement ring business was ready for innovation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Rosy Bluerosyblue.com HQ: Antwerp, BelgiumReported employees: 5,001-10,000 | Antwerp, Belgium | 5,001-10,000 | Exact match | 467 contacts → |
“Rosy Blue is one of the most renowned diamond and jewelry companies in the world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Dharmanandan Diamonds Pvt. LTDddpl.com HQ: Mumbai, IndiaReported employees: 5,001-10,000 | Mumbai, India | 5,001-10,000 | Exact match | 415 contacts → |
“Dharmanandan Diamonds, widely known as DDPL is a prominent natural diamond manufacturing company.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | HQ: New York, NY, United StatesReported employees: 501-1,000 | New York, NY, United States | 501-1,000 | Exact match | 394 contacts → |
“IGI, a Blackstone portfolio company, is the world’s largest independent provider of gemological services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ZEN Pırlantazenpirlanta.com HQ: Bahçelievler / Istanbul, TürkiyeReported employees: 201-500 | Bahçelievler / Istanbul, Türkiye | 201-500 | Exact match | 370 contacts → |
“Zen Pırlanta- Türkiye’nin pırlanta uzmanı- 1890’lara uzanan köklü geçmişe sahip bir marka- Türkiye’nin en çok tercih edilen pırlanta markası- Avrupa ve Ortadoğu’nun en büyük…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Kama Jewelrykamajewelry.com HQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 275 contacts → |
“Founded in 1996 with a mission to delight customers with exceptional products and superior service, Kama Jewelry has firmly established itself among the top ten diamond jewelry…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Uni-Designunidesign-jewel.com HQ: Mumbai, IndiaReported employees: 501-1,000 | Mumbai, India | 501-1,000 | Exact match | 267 contacts → |
“As pioneers in the jewellery industry, we are well-known for our high quality, reliability, and prompt customer service.We have a global footprint and collaborate with brands from…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Asian Star Company Limitedasianstargroup.com HQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 249 contacts → |
“OUR HERITAGE: The Asian Star group represents a rich heritage of values, skills and experience, amassed over five decades in the diamond industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Laxmi Diamond Pvt. LTDlaxmidiamond.com HQ: Surat, IndiaReported employees: 5,001-10,000 | Surat, India | 5,001-10,000 | Exact match | 248 contacts → |
“Established in 1972, Laxmi Diamond is one of the leading diamond manufacturers, with its footprints spread across the globe.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HRD Antwerphrdantwerp.com HQ: Antwerp, BelgiumReported employees: 201-500 | Antwerp, Belgium | 201-500 | Exact match | 234 contacts → |
“HRD Antwerp is the leading authority when it comes to Diamond Grading, Jewellery Grading and Education.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Goldstar Jewellerygoldstarjewellery.com HQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 225 contacts → |
“Established in 1962, Goldstar is a trusted name in the diamond and jewellery industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Rapaportrapaport.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 204 contacts → |
“The Rapaport Group is an international network of companies providing first class, added value services that support the development of free, fair, efficient and competitive…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Dimexon Diamondsdimexon.com HQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 199 contacts → |
“Dimexon Diamonds Ltd, with sales offices in all 4 corners of the globe, is one of the world’s leading diamond manufacturers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Mullermuller.be HQ: Zoutleeuw, BelgiumReported employees: 501-1,000 | Zoutleeuw, Belgium | 501-1,000 | Exact match | 195 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 | SGL Labssgl-labs.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 175 contacts → |
“Peace of mind, Assured.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Rare Caratrarecarat.com HQ: New York City, NY, United StatesReported employees: 51-200 | New York City, NY, United States | 51-200 | Exact match | 168 contacts → |
“Founded in 2016 by a former BCG consultant frustrated with his own engagement ring buying experience, Rare Carat began with a mission to make diamond buying more transparent for…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Hearts On Fireheartsonfire.com HQ: Hong KongReported employees: 201-500 | Hong Kong | 201-500 | Exact match | 166 contacts → |
“HEARTS ON FIRE® is a modern diamond jewelry brand renowned for the beauty of its signature cut diamonds.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Gemological Science International GSIgemscience.net HQ: Manhattan, United StatesReported employees: 51-200 | Manhattan, United States | 51-200 | Exact match | 160 contacts → |
“Gemological Science International (GSI) is one of the largest gemological laboratories with 13 offices in the United States, India, UAE, Hong Kong and Thailand.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Blue Diamondbluediamond.com.tr HQ: İstanbul, TürkiyeReported employees: 1,001-5,000 | İstanbul, Türkiye | 1,001-5,000 | Exact match | 144 contacts → |
“Blue Diamond, 2004 yılında toptancı bir firma olarak, mücevher sektörüne pırlanta tedarik etmek ve sektörü pırlanta konusunda eğitmek amacıyla kuruldu.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Ankit Gemsankitgems.com HQ: Mumbai, IndiaReported employees: 1,001-5,000 | Mumbai, India | 1,001-5,000 | Exact match | 126 contacts → |
“A dream company started by three visionaries; Arvind Shah, Arun Shah and Dilip Shah in 1985, was then strengthened by Vasant Shah, Pravin Shah and Dilip Soni, bringing together…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Bafleh Jewellerybafleh.com HQ: Deira, United Arab EmiratesReported employees: 201-500 | Deira, United Arab Emirates | 201-500 | Exact match | 126 contacts → |
“Bafleh Jewellery is one of the leading wholesale jewellery company in UAE.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Kapu Gemskapugems.com HQ: Mumbai, IndiaReported employees: 501-1,000 | Mumbai, India | 501-1,000 | Exact match | 122 contacts → |
“For over six decades, Kapu Gems has been more than a manufacturer.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | International Diamond Centershopidc.com HQ: Clearwater, FL, United StatesReported employees: 51-200 | Clearwater, FL, United States | 51-200 | Exact match | 111 contacts → |
“Founded by Keith Leclerc in 1981, International Diamond Center began as a jewelry wholesaler.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Suashish Diamonds Limitedsuashish.com HQ: Mumbai, IndiaReported employees: 201-500 | Mumbai, India | 201-500 | Exact match | 109 contacts → |
“Suashish Diamonds Ltd.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,987 company matches
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Diamond certification companies: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,973 records in the displayed employee bands.
14 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,987 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Diamond certification companies by location
12 lists · largest firstEvery Diamond certification companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Diamond certification companies based in India544
- Diamond certification companies based in the United States404
- Diamond certification companies based in the United Kingdom72
- Diamond certification companies based in Belgium70
- Diamond certification companies based in the United Arab Emirates53
- Diamond certification companies based in Hong Kong51
- Diamond certification companies based in Australia46
- Diamond certification companies based in Israel38
- Diamond certification companies based in Thailand28
- Diamond certification companies based in Switzerland26
Cities
Questions about this company list
What does Exact match mean for diamond certification companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many diamond certification companies did RevenueBase find worldwide?
The saved snapshot records 1,987 matching company records, 23,759 tracked contacts and 4,215 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 diamond certification companies worldwide. Snapshot: September 19, 2026. https://revenuebase.ai/companies/browse/diamond-certification-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗