Company lists · Data refreshed September 2026
Top 25 Certified diamond sellers worldwide
RevenueBase identified 1,759 certified diamond sellers worldwide as of September 2026 and tracks 19,925 professional contacts across them, including 4,270 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers certified diamond sellers worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for certified diamond sellers follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 certified diamond sellers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,052 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 919 contacts → | ||||
Partial evidence “Global Pioneers in the art of jewelry and diamond perfection since ORRA's diamonds are rare, unique & responsibly sourced.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 858 contacts → | ||||
Partial evidence “Blue Nile was founded in with the idea that the diamond and engagement ring business was ready for innovation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 587 contacts → | ||||
Partial evidence “Founded in 1995 and headquartered in Charlotte, North Carolina, Diamonds Direct offers one of the largest selections of fine jewelry and diamonds in the United States.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 394 contacts → | ||||
Indirect evidence “IGI, a Blackstone portfolio company, is the world’s largest independent provider of gemological services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 370 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 275 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 249 contacts → | ||||
Partial evidence “OUR HERITAGE: The Asian Star group represents a rich heritage of values, skills and experience, amassed over five decades in the diamond industry.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 234 contacts → | ||||
Partial evidence “HRD Antwerp is the leading authority when it comes to Diamond Grading, Jewellery Grading and Education.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 204 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 199 contacts → | ||||
Partial evidence “Dimexon Diamonds Ltd, with sales offices in all 4 corners of the globe, is one of the world’s leading diamond manufacturers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 195 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 175 contacts → | ||||
Indirect evidence “Peace of mind, Assured.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 168 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 160 contacts → | ||||
Indirect evidence “Gemological Science International (GSI) is one of the largest gemological laboratories with 13 offices in the United States, India, UAE, Hong Kong and Thailand.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 144 contacts → | ||||
Partial evidence “Blue Diamond, 2004 yılında toptancı bir firma olarak, mücevher sektörüne pırlanta tedarik etmek ve sektörü pırlanta konusunda eğitmek amacıyla kuruldu.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 132 contacts → | ||||
Partial evidence “Founded in Vancouver B.C, Spence Diamonds has been in the diamond business for 40 years, and we’ve given hundreds of thousands of couples the confidence to find the diamond ring…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 126 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 122 contacts → | ||||
Indirect evidence “For over six decades, Kapu Gems has been more than a manufacturer.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 111 contacts → | ||||
Partial evidence “Founded by Keith Leclerc in 1981, International Diamond Center began as a jewelry wholesaler.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 109 contacts → | ||||
Partial evidence “Suashish Diamonds Ltd.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 88 contacts → | ||||
Partial evidence “Star Rays is a diamond manufacturer who are passionate about their products and solely focused on the diamond industry.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 82 contacts → | ||||
Partial evidence “Stargems Group is an international diamond company that specializes in the sourcing and supply of the finest diamonds to customers across the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 75 contacts → | ||||
Indirect evidence “Established in 1986, the La Marquise story commenced with the transformation of the precious stones into spectacular magnum opus which are unique and splendid in its formation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 73 contacts → | ||||
Partial evidence “Genesis Diamonds has been redefining the jewelry experience since 2004, bringing unmatched value, education, and selection to Tennessee, Ohio, and Kentucky.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: certified diamond sellers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names certified diamond sellers.
- Partial evidence
- Its own public description names part of certified diamond sellers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name certified diamond sellers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,759 certified diamond sellers worldwide
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Certified diamond sellers 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
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among certified diamond sellers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for certified diamond sellers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “certified diamond sellers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names certified diamond sellers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among certified diamond sellers, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 4,270 across the full list. 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.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Certified diamond sellers by location
9 lists · largest firstEvery Certified diamond sellers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Certified diamond sellers based in the United States429
- Certified diamond sellers based in India405
- Certified diamond sellers based in the United Kingdom77
- Certified diamond sellers based in Belgium63
- Certified diamond sellers based in the United Arab Emirates51
- Certified diamond sellers based in Hong Kong50
- Certified diamond sellers based in Australia48
- Certified diamond sellers based in Canada46
- Certified diamond sellers based in Israel32
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names certified diamond sellers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many certified diamond sellers are there worldwide?
RevenueBase identified 1,759 certified diamond sellers worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Kiran Gems Private Limited, headquartered in Bandra East Mumbai, tops this list with the largest team on record.
Which country has the most certified diamond sellers?
The United States leads with 429 companies, followed by India (405) and the United Kingdom (77). Every certified diamond sellers list by country and city is linked on this page.
Which city has the most certified diamond sellers?
New York leads with 155 headquartered companies, followed by Mumbai (130) and Surat (112).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,270 verified decision-maker contacts tracked across these 1,759 companies.
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.
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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 Smart Search, 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.