Company lists · Data refreshed September 2026

Top 25 Diamond suppliers worldwide

Name: Diamond suppliers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 6,547 companies tracked

RevenueBase identified 6,547 diamond suppliers worldwide as of September 2026 and tracks 75,479 professional contacts across them, including 13,656 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers diamond suppliers 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 diamond suppliers 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

6,547Companies

75,479Contacts tracked

13,656Verified emails

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The 25 largest diamond suppliers worldwide

Ranked by team size

Top 25 of 6,547 diamond suppliers worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to diamond suppliers: 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	DE Beers Group	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	3,820 contacts →
	Partial evidence “The only luxury diamond brand present at source.” Source: RevenueBase Database · checked Sep 19, 2026
2	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
3	Petra Diamonds	Strong evidence	St. Helier, JerseyHQ checked Sep 19, 2026	5,001-10,000	1,122 contacts →
	Strong evidence “Petra Diamonds is a leading independent diamond mining group and a consistent supplier of gem quality rough diamonds to the international market.” Source: RevenueBase Database · checked Sep 19, 2026
4	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
5	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
6	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
7	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
8	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
9	Hari Krishna Exports Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	5,001-10,000	861 contacts →
	Partial evidence “At Hari Krishna Exports, we are a global leader in the natural diamond industry, powered by a purpose that goes beyond our stones.” Source: RevenueBase Database · checked Sep 19, 2026
10	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
11	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
12	PC Jeweller LTD	Indirect evidence	New Delhi, IndiaHQ checked Sep 19, 2026	1,001-5,000	664 contacts →
	Indirect evidence “It all started when PC Jeweller first opened its first showroom in 2005 in Karol Bagh, New Delhi with a vision to redefine elegance, allure and style in the form of stunning…” Source: RevenueBase Database · checked Sep 19, 2026
13	GRAFF	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	649 contacts →
	Indirect evidence “For over half a century our House has represented the rarest gemstones.” Source: RevenueBase Database · checked Sep 19, 2026
14	Diamonds Direct	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 19, 2026	501-1,000	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, 2026
15	Alrosa Company Limited	Partial evidence	RussiaHQ checked Sep 19, 2026	10001+	586 contacts →
	Partial evidence “ALROSA Company Limited is one of the world’s leading companies in the field of diamond exploration, mining and sales of rough diamonds, and diamond manufacture.” Source: RevenueBase Database · checked Sep 19, 2026
16	Reeds Jewelers	Indirect evidence	Wilmington, NC, United StatesHQ checked Sep 19, 2026	501-1,000	541 contacts →
	Indirect evidence “Founded in 1946 by Bill and Roberta Zimmer in Wilmington NC, REEDS Jewelers is a true American success story.” Source: RevenueBase Database · checked Sep 19, 2026
17	Rosy Blue	Partial evidence	Antwerp, BelgiumHQ checked Sep 19, 2026	5,001-10,000	467 contacts →
	Partial evidence “Rosy Blue is one of the most renowned diamond and jewelry companies in the world.” Source: RevenueBase Database · checked Sep 19, 2026
18	Dharmanandan Diamonds Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	5,001-10,000	415 contacts →
	Partial evidence “Dharmanandan Diamonds, widely known as DDPL is a prominent natural diamond manufacturing company.” Source: RevenueBase Database · checked Sep 19, 2026
19	Beaverbrooks	Indirect evidence	Lytham St. Annes, United KingdomHQ checked Sep 19, 2026	1,001-5,000	407 contacts →
	Indirect evidence “There’s nowhere quite like The Beaverbrooks Group.” Source: RevenueBase Database · checked Sep 19, 2026
20	Namdeb Diamond Corporation	Partial evidence	Windhoek, NamibiaHQ checked Sep 19, 2026	1,001-5,000	401 contacts →
	Partial evidence “We produce diamonds, profitably, sustainably and responsibly for the benefit of our shareholders and other stakeholders whilst making a lasting contribution to Namibia.” Source: RevenueBase Database · checked Sep 19, 2026
21	International Gemological Institute - USA	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	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, 2026
22	ZEN Pırlanta	Indirect evidence	Bahçelievler / Istanbul, TürkiyeHQ checked Sep 19, 2026	201-500	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, 2026
23	PMJ Gems & Jewellers PVT LTD	Partial evidence	Hyderabad, IndiaHQ checked Sep 19, 2026	201-500	354 contacts →
	Partial evidence “PMJ Gems & Jewellers Pvt Ltd is a diamond-studded jewellery manufacturer and retailer providing hand-crafted jewels of par excellence quality since 1964.” Source: RevenueBase Database · checked Sep 19, 2026
24	Browns Jewellers	Partial evidence	Craighall Park, South AfricaHQ checked Sep 19, 2026	201-500	350 contacts →
	Partial evidence “Three generations of excellent craftsmanship; since 1934 our family has been crafting the finest diamond jewellery.” Source: RevenueBase Database · checked Sep 19, 2026
25	Damiani Group	Partial evidence	Valenza (al), ItalyHQ checked Sep 19, 2026	501-1,000	344 contacts →
	Partial evidence “Damiani Group was founded in 1924 in Valenza, homeland of the best Italian jewelry tradition, thanks to Enrico Grassi, who began designing and creating jewels with diamonds: small…” 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: diamond suppliers. 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 diamond suppliers.
Partial evidence: Its own public description names part of diamond suppliers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diamond suppliers. 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 6,547 diamond suppliers worldwide

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Diamond suppliers worldwide at a glance

As of Sep 19, 2026

18.1%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

6.4%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

3,317

11-50

1,906

51-200

693

201-500

293

501-1,000

135

1,001-5,000

114

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 diamond suppliers, 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 diamond suppliers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “diamond suppliers”. 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 diamond suppliers), 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 diamond suppliers, 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, 13,656 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.

Diamond suppliers by location

28 lists · largest first

Every Diamond suppliers 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 diamond suppliers, 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 diamond suppliers are there worldwide?

RevenueBase identified 6,547 diamond suppliers 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?

DE Beers Group, headquartered in London, tops this list with the largest team on record.

Which country has the most diamond suppliers?

The United States leads with 1,621 companies, followed by India (1,468) and the United Kingdom (302). Every diamond suppliers list by country and city is linked on this page.

Which city has the most diamond suppliers?

New York leads with 416 headquartered companies, followed by Mumbai (370) and Surat (327).

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 13,656 verified decision-maker contacts tracked across these 6,547 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.