Company lists · Data refreshed September 2026

Top 25 Certified diamond dealers worldwide

Name: Certified diamond dealers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 16,136 companies tracked

RevenueBase identified 16,136 certified diamond dealers worldwide as of September 2026 and tracks 184,772 professional contacts across them, including 29,666 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers certified diamond dealers 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 dealers 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

16,136Companies

184,772Contacts tracked

29,666Verified emails

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The 25 largest certified diamond dealers worldwide

Ranked by team size

Top 25 of 16,136 certified diamond dealers worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to certified diamond dealers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Signet Jewelers	Partial evidence	Akron, OH, United StatesHQ checked Sep 19, 2026	10001+	6,690 contacts →
	Partial evidence “Signet operates approximately 2,600 stores primarily under the name brands of Kay Jewelers, Zales, Jared, Banter by Piercing Pagoda, Diamonds Direct, Blue Nile, Peoples Jewellers…” Source: RevenueBase Database · checked Sep 19, 2026
2	Kalyan Jewellers India Limited	Indirect evidence	Thrissur, IndiaHQ checked Sep 19, 2026	10001+	3,109 contacts →
	Indirect evidence “Kalyan Jewellers is one of the largest jewellery retailers in India, with its headquarters in Thrissur, Kerala.” Source: RevenueBase Database · checked Sep 19, 2026
3	Caratlane	Indirect evidence	Chennai, IndiaHQ checked Sep 19, 2026	1,001-5,000	2,453 contacts →
	Indirect evidence “CaratLane, India’s first omni-channel jewellery brand, has been redefining how people experience jewellery since its founding in 2008, by Mithun Sacheti and Srinivasa Gopalan.” Source: RevenueBase Database · checked Sep 19, 2026
4	Jared Jewelers	Partial evidence	Akron, OH, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,118 contacts →
	Partial evidence “Jared is redefining how luxury is felt and expressed, through unique and memorable customer experiences and an array of on-trend, high-quality 18K gold and diamond fine jewelry…” Source: RevenueBase Database · checked Sep 19, 2026
5	Tous Jewelry	Indirect evidence	Manresa, SpainHQ checked Sep 19, 2026	1,001-5,000	1,838 contacts →
	Indirect evidence “About TOUS With more than professionals, TOUS has promoted its corporate culture based on legacy, commitment and creativity since it was set up in 1920, when it started out in the…” Source: RevenueBase Database · checked Sep 19, 2026
6	James Avery Artisan Jewelry	Indirect evidence	Kerrville, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,655 contacts →
	Indirect evidence “James Avery Jewelry offers high quality, artfully crafted jewelry in sterling silver, gold and gemstones.” Source: RevenueBase Database · checked Sep 19, 2026
7	Helzberg Diamonds	Indirect evidence	North Kansas City, MO, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,599 contacts →
	Indirect evidence “The Helzberg name stands for care and craft in every story since 1915.” Source: RevenueBase Database · checked Sep 19, 2026
8	Michael Hill	Indirect evidence	Cannon Hill, AustraliaHQ checked Sep 19, 2026	1,001-5,000	1,423 contacts →
	Indirect evidence “At Michael Hill, we are fuelled by our passion for helping people mark life’s moments - both big and small.” Source: RevenueBase Database · checked Sep 19, 2026
9	Watches Of Switzerland Group PLC	Indirect evidence	Leicester, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,256 contacts →
	Indirect evidence “We're a FTSE-250 retail company employing nearly people across the UK and the United States.” Source: RevenueBase Database · checked Sep 19, 2026
10	Pt. Central Mega Kencana	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 19, 2026	1,001-5,000	1,209 contacts →
	Indirect evidence “Central Mega Kencana has established its presence for 50 years in the world of luxury as the biggest retail jewelry company in Southeast Asia, with over 110 stores.” Source: RevenueBase Database · checked Sep 19, 2026
11	KGK Group	Indirect evidence	Kowloon, Hong KongHQ checked Sep 19, 2026	10001+	1,118 contacts →
	Indirect evidence “The KGK group, established in 1905 by the Kothari family of Jaipur (India), is a global corporation with fully integrated operations in the Gems & Jewellery industry, with a…” Source: RevenueBase Database · checked Sep 19, 2026
12	Bucherer AG	Indirect evidence	Lucerne, SwitzerlandHQ checked Sep 19, 2026	1,001-5,000	1,087 contacts →
	Indirect evidence “In businessman and entrepreneur Carl-Friedrich Bucherer opened his first watch and jewellery store in Lucerne with his wife, Luise, laying the foundation for becoming one of the…” Source: RevenueBase Database · checked Sep 19, 2026
13	Stuller, INC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,061 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
14	Kiran Gems Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	10001+	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, 2026
15	Diamonds International	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,050 contacts →
	Partial evidence “Diamonds International® was established over 30 years ago.” Source: RevenueBase Database · checked Sep 19, 2026
16	Shane CO	Indirect evidence	Greenwood Village, CO, United StatesHQ checked Sep 19, 2026	501-1,000	1,004 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	GIVA	Indirect evidence	Bangalore, IndiaHQ checked Sep 19, 2026	1,001-5,000	985 contacts →
	Indirect evidence “GIVA is a premium jewellery brand aiming with a vision to make authentic, elegant and fine jewellery accessible in India.” Source: RevenueBase Database · checked Sep 19, 2026
18	Bijou Brigitte	Indirect evidence	Hamburg, GermanyHQ checked Sep 19, 2026	1,001-5,000	935 contacts →
	Indirect evidence “Bijou Brigitte - Von einem kleinen Handelsunternehmen aus Hamburg zu einem internationalen, börsennotierten Konzern.” Source: RevenueBase Database · checked Sep 19, 2026
19	Orra Fine Jewellery	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	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, 2026
20	Harry Winston	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	911 contacts →
	Indirect evidence “Harry Winston, Inc, the premier fine jewelry and watch retailer, is owned by The Swatch Group.” Source: RevenueBase Database · checked Sep 19, 2026
21	Effy Jewelry	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	911 contacts →
	Indirect evidence “Established in 1979 by renowned jewelry designer Effy Hematian, Effy Jewelry is one of the most critically acclaimed and highly visible jewelry lines available in 2600 retail…” Source: RevenueBase Database · checked Sep 19, 2026
22	Hstern	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	1,001-5,000	886 contacts →
	Indirect evidence “Com 80 anos de história, a HStern é reconhecida mundialmente pelos conceitos criativos, iniciativas pioneiras e qualidade tradicional de suas joias.” Source: RevenueBase Database · checked Sep 19, 2026
23	Blue Nile	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	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, 2026
24	Brilliant Earth	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	501-1,000	846 contacts →
	Indirect evidence “Brilliant Earth was founded by Beth Gerstein and Eric Grossberg as a response to the lack of transparency and irresponsible mining practices that confront the jewelry industry…” Source: RevenueBase Database · checked Sep 19, 2026
25	GRT Jewellers India Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 19, 2026	10001+	840 contacts →
	Indirect evidence “Founded in 1964, GRT Jewellers is one of India's leading jewellery destinations.” Source: RevenueBase Database · checked Sep 19, 2026

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 dealers. 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 dealers.
Partial evidence: Its own public description names part of certified diamond dealers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name certified diamond dealers. 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 16,136 certified diamond dealers worldwide

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Certified diamond dealers worldwide at a glance

As of Sep 19, 2026

16.1%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

4.3%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

9,171

11-50

4,318

51-200

1,456

201-500

523

501-1,000

218

1,001-5,000

178

5,001-10,000

10001+

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 dealers, 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 dealers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “certified diamond dealers”. 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 dealers), 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 dealers, 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, 29,666 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 dealers by location

52 lists · largest first

Every Certified diamond dealers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 dealers, 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 dealers are there worldwide?

RevenueBase identified 16,136 certified diamond dealers 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?

Signet Jewelers, headquartered in Akron, tops this list with the largest team on record.

Which country has the most certified diamond dealers?

The United States leads with 4,553 companies, followed by India (2,591) and the United Kingdom (830). Every certified diamond dealers list by country and city is linked on this page.

Which city has the most certified diamond dealers?

New York leads with 689 headquartered companies, followed by Mumbai (475) and London (338).

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 29,666 verified decision-maker contacts tracked across these 16,136 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.