Company lists · Data refreshed September 2026

Semiconductor diamond manufacturers: the worldwide list

Name: Semiconductor diamond manufacturers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 421 companies across 3 countries

RevenueBase identified 421 semiconductor diamond manufacturers across the 3 countries with a published list, as of September 2026, and tracks 9,085 professional contacts across them, including 890 with verified work emails and 0 with mobile numbers. India is the largest market and Surat the largest hub.

This is the worldwide list of semiconductor diamond manufacturers: the 3 country lists RevenueBase publishes for the category, summed and ranked as one. The company count is that sum, not a census of every company on earth; a country with no published list is not counted. 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 17, 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 17, 2026 86% judged on-target in blind review

421Companies

9,085Contacts tracked

890Verified emails

0Mobile numbers

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The 25 largest semiconductor diamond manufacturers across the 3 countries with a published list

Ranked by team size

Top 25 of 421 semiconductor diamond manufacturers across the 3 countries with a published list, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to semiconductor diamond manufacturers: 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	CREE	Indirect evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,490 contacts →
	Indirect evidence “This is the former Cree account.” Source: RevenueBase Database · checked Sep 17, 2026
2	Kiran Gems Private Limited	Strong evidence	Mumbai, IndiaHQ checked Sep 17, 2026	10001+	1,052 contacts →
	Strong 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 17, 2026
3	GT Advanced Technologies	Partial evidence	Hudson, NH, United StatesHQ checked Sep 17, 2026	n/a	654 contacts →
	Partial evidence “GTAT is a producer of high-quality crystal materials for applications as diverse as advanced semiconductors, high-energy lasers, and aerospace/defense windows.” Source: RevenueBase Database · checked Sep 17, 2026
4	Dharmanandan Diamonds Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 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 17, 2026
5	Laxmi Diamond Pvt. LTD	Strong evidence	Surat, IndiaHQ checked Sep 17, 2026	5,001-10,000	248 contacts →
	Strong 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 17, 2026
6	Goldstar Jewellery	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 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 17, 2026
7	Dimexon Diamonds	Strong evidence	Mumbai, IndiaHQ checked Sep 17, 2026	1,001-5,000	199 contacts →
	Strong 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 17, 2026
8	Kapu Gems	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 2026	501-1,000	122 contacts →
	Partial evidence “For over six decades, Kapu Gems has been more than a manufacturer.” Source: RevenueBase Database · checked Sep 17, 2026
9	VRAI	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	105 contacts →
	Indirect evidence “VRAI crafts fine jewelry by thoughtfully entwining groundbreaking science and sophisticated design.” Source: RevenueBase Database · checked Sep 17, 2026
10	Star Rays	Strong evidence	Mumbai, IndiaHQ checked Sep 17, 2026	501-1,000	88 contacts →
	Strong 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 17, 2026
11	Maitri Diamonds INC	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	71 contacts →
	Strong evidence “Maitri Diamonds manufactures the perfectly sustainable alternative to naturally sourced mined diamonds – Lab-grown Diamonds.” Source: RevenueBase Database · checked Sep 17, 2026
12	Greenlab Diamonds	Partial evidence	Surat, IndiaHQ checked Sep 17, 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 17, 2026
13	Bhanderi LAB Grown Diamonds	Partial evidence	Surat, IndiaHQ checked Sep 17, 2026	501-1,000	66 contacts →
	Partial evidence “Bhanderi Lab Grown Diamonds is an emerging name in the CVD diamond industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Grown Diamond Corporation	Partial evidence	NY, United StatesHQ checked Sep 17, 2026	11-50	50 contacts →
	Partial evidence “Grown Diamond Corporation was established in 2012, where along with our partners we have invested strongly over the years in advanced/disruptive technologies to successfully grow…” Source: RevenueBase Database · checked Sep 17, 2026
15	Americarb	Partial evidence	Niagara Falls, NY, United StatesHQ checked Sep 17, 2026	51-200	50 contacts →
	Partial evidence “Americarb is a manufacturer of carbon and graphite materials specializing in high temperature processing and purification of carbon and graphite materials at temperatures up to C.” Source: RevenueBase Database · checked Sep 17, 2026
16	Incent-Lgd	Partial evidence	Chennai, IndiaHQ checked Sep 17, 2026	51-200	46 contacts →
	Partial evidence “We at InCent-LGD are passionate about shaping the future of lab grown diamond.” Source: RevenueBase Database · checked Sep 17, 2026
17	Ratnakala Exports Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 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 17, 2026
18	R.Rajesh Exports	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 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 17, 2026
19	General Tool, INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	51-200	39 contacts →
	Partial evidence “General Tool is a privately-owned diamond tool manufacturing company headquartered in Irvine, California.” Source: RevenueBase Database · checked Sep 17, 2026
20	Narola Diamonds	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 2026	51-200	39 contacts →
	Partial evidence “It all started in 1989 with small unit of manufacturing in Surat (INDIA) having only one passion in mind to produce finest quality of diamonds and supply to the World.” Source: RevenueBase Database · checked Sep 17, 2026
21	LTD Material LLC	Strong evidence	Austin, TX, United StatesHQ checked Sep 17, 2026	51-200	38 contacts →
	Strong evidence “LTD Material, LLC provides an extensive range of products used by the leading semiconductor manufacturers and quartz fabrication companies in North America, Europe and Asia.” Source: RevenueBase Database · checked Sep 17, 2026
22	Fiona Diamonds	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 2026	11-50	37 contacts →
	Partial evidence “Fiona, is India's first lab grown diamond brand.” Source: RevenueBase Database · checked Sep 17, 2026
23	Great Lakes Crystal Technologies	Partial evidence	East Lansing, MI, United StatesHQ checked Sep 17, 2026	11-50	35 contacts →
	Partial evidence “GLCT's mission is to become the leading provider of high-performance crystalline diamond materials for high-technology applications” Source: RevenueBase Database · checked Sep 17, 2026
24	Esk-Sic Gmbh	Indirect evidence	Frechen, GermanyHQ checked Sep 17, 2026	51-200	34 contacts →
	Indirect evidence “Mit über 80 Jahren Erfahrung gehört unser mittelständisches Unternehmen ESK-SIC weltweit zu den renommiertesten Herstellern von qualitativ hochwertigem Siliciumcarbid.” Source: RevenueBase Database · checked Sep 17, 2026
25	Sonani Industries PVT LTD	Partial evidence	Surat, IndiaHQ checked Sep 17, 2026	201-500	34 contacts →
	Partial evidence “Sonani Industries Private Limited is Center a leading research institution dedicated to the advancement of the field of lab-grown diamonds.” Source: RevenueBase Database · checked Sep 17, 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: semiconductor diamond manufacturers. 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 semiconductor diamond manufacturers.
Partial evidence: Its own public description names part of semiconductor diamond manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name semiconductor diamond manufacturers. 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 421 semiconductor diamond manufacturers across the 3 countries with a published list

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Semiconductor diamond manufacturers worldwide at a glance

As of Sep 17, 2026

9.8%Verified-email coverage

21.6Average contacts per company

11-50Median size (employees)

27.3%Largest-city concentration · Surat

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

118

11-50

127

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 semiconductor diamond manufacturers, 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: This worldwide list is the sum of the 3 country lists RevenueBase publishes for semiconductor diamond manufacturers, largest first: India, the United States, Germany. Its company and contact totals add up those lists, so they understate the true worldwide figures: a country with no published list is not counted. The ranked table is exact across the countries covered, the largest companies of every country list ranked together with duplicates removed.
What qualifies: Companies worldwide whose own description of what they do matches “semiconductor diamond manufacturers”. 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 semiconductor diamond manufacturers), 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 semiconductor diamond manufacturers, 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, 890 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: The country lists behind this page were pulled from the company graph on September 17, 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.

Semiconductor diamond manufacturers by location

3 lists · largest first

Every Semiconductor diamond manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date; the worldwide figures above are the sum of the 3 country lists.

Countries

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 semiconductor diamond manufacturers, 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 semiconductor diamond manufacturers are there worldwide?

RevenueBase identified 421 semiconductor diamond manufacturers across the 3 countries with a published list, as of September 2026, matched on each company's own description of what it does rather than its industry code. The figure is the sum of those country lists, not a census of every company worldwide.

What is the largest company on this list?

CREE, headquartered in Durham, tops this list with the largest team on record.

Which country has the most semiconductor diamond manufacturers?

India leads with 259 companies, followed by the United States (136) and Germany (26). Every country with a published semiconductor diamond manufacturers list is linked on this page.

Which city has the most semiconductor diamond manufacturers?

Surat leads with 115 headquartered companies, followed by Mumbai (74) and New York (55).

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 890 verified decision-maker contacts tracked across these 421 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. The country lists behind this page were pulled from the company graph on September 17, 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.