Company lists · Data refreshed September 2026

Top 25 Diamond certification companies based in India

Name: Diamond certification companies based in India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 544 companies tracked

RevenueBase identified 544 diamond certification companies headquartered in India as of September 2026 and tracks 8,973 professional contacts across them, including 746 with verified work emails. Mumbai is the largest hub.

This list covers diamond certification companies headquartered in India, 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.

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

544Companies

8,973Contacts tracked

746Verified emails

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The 25 largest diamond certification companies based in India

Ranked by team size

Top 25 of 544 diamond certification companies based in India, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to diamond certification companies: 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	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
2	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
3	Uni-Design	Indirect evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	267 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
4	Asian Star Company Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	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, 2026
5	Laxmi Diamond Pvt. LTD	Partial evidence	Surat, IndiaHQ checked Sep 19, 2026	5,001-10,000	248 contacts →
	Partial evidence “Established in 1972, Laxmi Diamond is one of the leading diamond manufacturers, with its footprints spread across the globe.” Source: RevenueBase Database · checked Sep 19, 2026
6	Goldstar Jewellery	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	225 contacts →
	Partial evidence “Established in 1962, Goldstar is a trusted name in the diamond and jewellery industry.” Source: RevenueBase Database · checked Sep 19, 2026
7	IGI	Indirect evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	220 contacts →
	Indirect evidence “The International Gemological Institute (IGI), a Blackstone portfolio company.” Source: RevenueBase Database · checked Sep 19, 2026
8	Dimexon Diamonds	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	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, 2026
9	Ankit Gems	Indirect evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	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, 2026
10	Kapu Gems	Indirect evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	122 contacts →
	Indirect evidence “For over six decades, Kapu Gems has been more than a manufacturer.” Source: RevenueBase Database · checked Sep 19, 2026
11	Suashish Diamonds Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	201-500	109 contacts →
	Partial evidence “Suashish Diamonds Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
12	Jewelex India PVT LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	106 contacts →
	Partial evidence “Like the multiple facets of a diamond, Jewelex goes beyond the value chain by providing superior products, customer care and services that are acknowledged within the global…” Source: RevenueBase Database · checked Sep 19, 2026
13	Star Rays	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	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, 2026
14	D. Navinchandra Jewels	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	201-500	87 contacts →
	Partial evidence “About Us We are a leading manufacturer and exporter of diamond-studded jewelry, proudly operating out of S.E.E.P.Z, Mumbai, India.” Source: RevenueBase Database · checked Sep 19, 2026
15	Blue Star Diamonds Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	70 contacts →
	Partial evidence “The Blue Star Diamonds group was established in Mumbai by Vasantlal Mehta in 1966.” Source: RevenueBase Database · checked Sep 19, 2026
16	Greenlab Diamonds	Partial evidence	Surat, IndiaHQ checked Sep 19, 2026	1,001-5,000	69 contacts →
	Partial evidence “Greenlab Diamonds is the world’s largest lab-grown Diamond Cultivator.” Source: RevenueBase Database · checked Sep 19, 2026
17	Divine Solitaires	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	51-200	67 contacts →
	Partial evidence “Divine Solitaires is the first & only loose solitaire brand in India which provides its consumer with the world’s finest & perfectly crafted solitaire diamonds in an organized &…” Source: RevenueBase Database · checked Sep 19, 2026
18	Solitario Diamonds	Partial evidence	Pune, IndiaHQ checked Sep 19, 2026	201-500	63 contacts →
	Partial evidence “Welcome to The Solitario - Elevate Your Elegance with Diamonds At The Solitario Lab Grown Diamonds, we're in the business of crafting dreams and turning moments into cherished…” Source: RevenueBase Database · checked Sep 19, 2026
19	Mahendra Brothers	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	59 contacts →
	Partial evidence “Established in 1960, Mahendra Brothers Exports Private Limited is integral to the diamond business.” Source: RevenueBase Database · checked Sep 19, 2026
20	Diyora Diamond	Partial evidence	Surat, IndiaHQ checked Sep 19, 2026	501-1,000	49 contacts →
	Partial evidence “At Diyora Diamonds, we don't carve just carve gems.” Source: RevenueBase Database · checked Sep 19, 2026
21	Sanghvi & Sons	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	201-500	47 contacts →
	Partial evidence “Be Precious, Be You With a legacy of Four decades, Sanghvi & Sons came into existence in 1981 as a diamond merchant and diamond exporter.” Source: RevenueBase Database · checked Sep 19, 2026
22	Paladiya Brothers	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	46 contacts →
	Partial evidence “Welcome to Paladiya Brothers & Co, we pride ourselves on being a trusted name in the diamond industry, offering exceptional quality and unparalleled service.” Source: RevenueBase Database · checked Sep 19, 2026
23	Ratnakala Exports Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	44 contacts →
	Partial evidence “Ratnakala is a natural diamond manufacturing company with more than forty-five years of experience serving both Indian and international markets.” Source: RevenueBase Database · checked Sep 19, 2026
24	R.Rajesh Exports	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	44 contacts →
	Partial evidence “R.Rajesh Exports, which was founded in the early 1970’s, has emerged as a front row leader in the manufacturing of Finest Quality Diamonds and continues to expand its wings…” Source: RevenueBase Database · checked Sep 19, 2026
25	VD Global Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 19, 2026	n/a	43 contacts →
	Indirect evidence “For over 50 years and three generations, De Beers Sightholder VD Global (VDG) has been a trusted partner to the world’s leading luxury houses, delivering ethically sourced, fully…” 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 certification companies. 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 certification companies.
Partial evidence: Its own public description names part of diamond certification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diamond certification companies. 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 544 diamond certification companies based in India

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Diamond certification companies based in India at a glance

As of Sep 19, 2026

8.3%Verified-email coverage

16.5Average contacts per company

11-50Median size (employees)

32.5%Largest-city concentration · Mumbai

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

175

11-50

152

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for India, so it is reported there. Company counts and contact totals on this page are exact for India, over 544 companies.

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 certification companies, 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.
What qualifies: Companies headquartered in India whose own description of what they do matches “diamond certification companies”. 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 certification companies), 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 certification companies, and records with no verified work email. Companies headquartered outside India are excluded even when they keep an office there.
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, 746 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 certification companies by metro

Diamond certification companies in Mumbai177
Diamond certification companies in Surat153
Diamond certification companies in New Delhi28
Diamond certification companies in Bandra East Mumbai26

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 certification companies, 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 certification companies are there based in India?

RevenueBase identified 544 diamond certification companies headquartered in India 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 city has the most diamond certification companies?

Mumbai leads with 177 headquartered companies, followed by Surat (153) and New Delhi (28).

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 746 verified decision-maker contacts tracked across these 544 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.