Company lists · Data refreshed September 2026

Top 25 Gemstone manufacturers based in the United Kingdom

Name: Gemstone manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 461 companies tracked

RevenueBase identified 461 gemstone manufacturers headquartered in the United Kingdom as of September 2026 and tracks 7,427 professional contacts across them, including 1,986 with verified work emails. London is the largest hub.

This list covers gemstone manufacturers headquartered in the United Kingdom, 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 16, 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 16, 2026 86% judged on-target in blind review

461Companies

7,427Contacts tracked

1,986Verified emails

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The 25 largest gemstone manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 461 gemstone manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to gemstone 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	DE Beers Group	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	10001+	3,820 contacts →
	Indirect evidence “The only luxury diamond brand present at source.” Source: RevenueBase Database · checked Sep 16, 2026
2	GRAFF	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	649 contacts →
	Partial evidence “For over half a century our House has represented the rarest gemstones.” Source: RevenueBase Database · checked Sep 16, 2026
3	Monica Vinader	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	354 contacts →
	Indirect evidence “Monica Vinader is a global, award-winning leader in responsible jewellery.” Source: RevenueBase Database · checked Sep 16, 2026
4	BTM	Indirect evidence	Richmond, United KingdomHQ checked Sep 16, 2026	n/a	221 contacts →
	Indirect evidence “BTM Marble & Granite was founded in 1995 and is today a specialist company dealing with imported natural stone products.” Source: RevenueBase Database · checked Sep 16, 2026
5	Chisholm Hunter	Partial evidence	Glasgow, United KingdomHQ checked Sep 16, 2026	201-500	179 contacts →
	Partial evidence “At Chisholm Hunter we pride ourselves on being ‘A Cut Above’, with a passion for providing exceptional diamonds, precious gemstones and Swiss timepieces, as well as creating…” Source: RevenueBase Database · checked Sep 16, 2026
6	Queensmith	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	59 contacts →
	Indirect evidence “At Queensmith, we believe jewellery should be as unique as the stories it represents.” Source: RevenueBase Database · checked Sep 16, 2026
7	Natural Stone Surfaces LTD	Partial evidence	Chapel En Le Frith, United KingdomHQ checked Sep 16, 2026	51-200	43 contacts →
	Partial evidence “Founded in 2001 with just three team members, Natural Stone Surfaces has vastly grown in size over the last decade to become one of the UK’s leading stone manufacturers.” Source: RevenueBase Database · checked Sep 16, 2026
8	Hockley Mint	Indirect evidence	Birmingham, United KingdomHQ checked Sep 16, 2026	51-200	35 contacts →
	Indirect evidence “Established in Birmingham’s Jewellery Quarter in 1953, Hockley Mint is an employee-owned business committed to exceptional quality and standard-setting British craftsmanship…” Source: RevenueBase Database · checked Sep 16, 2026
9	River Mounts Jewellery LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 16, 2026	11-50	29 contacts →
	Indirect evidence “River Mounts Jewellery Limited is an award-winning supplier of fine jewellery to the trade.” Source: RevenueBase Database · checked Sep 16, 2026
10	Granite House By Stone Masters	Indirect evidence	Preston, United KingdomHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “At Granite House we are known as 'The Home Of Stone' we can provide stone for use internally or externally and have specialised fabrication facility for worktops.” Source: RevenueBase Database · checked Sep 16, 2026
11	Livra UK LTD	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	27 contacts →
	Indirect evidence “Livra is the leading marble specialist in London.” Source: RevenueBase Database · checked Sep 16, 2026
12	Ashfield Stone Group	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	25 contacts →
	Indirect evidence “Ashfield are natural stone specialists serving the luxury residential, hospitality and commercial markets throughout London and further afield.” Source: RevenueBase Database · checked Sep 16, 2026
13	Henig Diamonds	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “For over 30 years, Henig Diamonds has been at the heart of the UK diamond trade, proudly supplying jewellers, wholesalers, and retailers across Europe.” Source: RevenueBase Database · checked Sep 16, 2026
14	Kiki Mcdonough	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “A Life of Colour since 1985.” Source: RevenueBase Database · checked Sep 16, 2026
15	Lapicida	Indirect evidence	Knaresborough, United KingdomHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Lapicida is the leading tile and stone specialist, supplying the finest natural stone and marble alongside genuine antique reclaimed flooring and the highest quality porcelain…” Source: RevenueBase Database · checked Sep 16, 2026
16	Fenton	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “Fenton is a fine jeweller based in the heart of Mayfair specialising in responsibly-sourced coloured gemstones and Solar Diamonds created by sunlight.” Source: RevenueBase Database · checked Sep 16, 2026
17	Artorius Faber	Partial evidence	Yeovil, United KingdomHQ checked Sep 16, 2026	51-200	19 contacts →
	Partial evidence “Bespoke British Stone Flooring, Paving and Internal Architecture Artorius Faber is one of the UK's leading manufacturers of stone surfaces.” Source: RevenueBase Database · checked Sep 16, 2026
18	Artisans Of Devizes	Indirect evidence	Devizes, United KingdomHQ checked Sep 16, 2026	51-200	18 contacts →
	Indirect evidence “Stone Experts.” Source: RevenueBase Database · checked Sep 16, 2026
19	Mireya	Indirect evidence	Clerkenwell, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “Mireya UK Ltd prides itself in offering integrated business solutions for diamond & diamond jewellery retailers.” Source: RevenueBase Database · checked Sep 16, 2026
20	The Marble & Granite Centre LTD	Indirect evidence	Rickmansworth, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “The Marble & Granite Centre Ltd is a natural stone wholsaler established in 1993 with the aim of providing an innovative and flexible approach to the supply of natural stone…” Source: RevenueBase Database · checked Sep 16, 2026
21	GMI	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “Founded in 1992, GMI has been successfully operating in the UK as a supplier and installer of high-quality natural stone sourced from all over the world.” Source: RevenueBase Database · checked Sep 16, 2026
22	Stoneworld	Indirect evidence	Great Milton, United KingdomHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “STONEWORLD - Everything you need in stone Our Story Stoneworld is a family business based in Oxfordshire with over 20 years of experience.” Source: RevenueBase Database · checked Sep 16, 2026
23	Berganza	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “At Berganza, we pride ourselves on having one of the most extensive collections of antique rings in the world.” Source: RevenueBase Database · checked Sep 16, 2026
24	Samara James	Indirect evidence	Shepperton, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “Samara James is an award winning jeweller specialising in perfectly cut diamonds.” Source: RevenueBase Database · checked Sep 16, 2026
25	Steve Bristow Stone Masonry	Indirect evidence	Newton Abbot, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “Welcome to Steve Bristow Stone Masonry, the South West's premier suppliers of natural bespoke worktops.” Source: RevenueBase Database · checked Sep 16, 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: gemstone 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 gemstone manufacturers.
Partial evidence: Its own public description names part of gemstone manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name gemstone 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 461 gemstone manufacturers based in the United Kingdom

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Gemstone manufacturers based in the United Kingdom at a glance

As of Sep 16, 2026

26.7%Verified-email coverage

16.1Average contacts per company

1-10Median size (employees)

41.4%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

296

11-50

124

51-200

201-500

501-1,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 461 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 gemstone 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “gemstone 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 gemstone 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 gemstone manufacturers, and records with no verified work email. Companies headquartered outside United Kingdom 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, 1,986 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 16, 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.

Gemstone manufacturers by metro

Gemstone manufacturers in London191

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 gemstone 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 gemstone manufacturers are there based in the United Kingdom?

RevenueBase identified 461 gemstone manufacturers headquartered in the United Kingdom 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 city has the most gemstone manufacturers?

London leads with 191 headquartered companies, followed by Birmingham (20) and Glasgow (5).

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 1,986 verified decision-maker contacts tracked across these 461 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 16, 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.