Company lists · Data refreshed September 2026

Top 25 Gemstone manufacturers based in Italy

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 414 companies tracked

RevenueBase identified 414 gemstone manufacturers headquartered in Italy as of September 2026 and tracks 2,945 professional contacts across them, including 682 with verified work emails. Valenza is the largest hub.

This list covers gemstone manufacturers headquartered in Italy, 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

414Companies

2,945Contacts tracked

682Verified emails

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The 25 largest gemstone manufacturers based in Italy

Ranked by team size

Top 25 of 414 gemstone manufacturers based in Italy, 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	Pomellato	Partial evidence	Milan, ItalyHQ checked Sep 16, 2026	201-500	643 contacts →
	Partial evidence “Established in Milan in 1967, Pomellato is renowned for its unique design, colorful gemstones, and elegant yet unconventional style.” Source: RevenueBase Database · checked Sep 16, 2026
2	Margraf SPA	Indirect evidence	Chiampo, ItalyHQ checked Sep 16, 2026	51-200	76 contacts →
	Indirect evidence “The history of Margraf had its beginning in 1906 in the province of Vicenza (Italy), with the initial use of some quarries in Chiampo, to today become an international business…” Source: RevenueBase Database · checked Sep 16, 2026
3	Salvatori	Indirect evidence	Querceta, ItalyHQ checked Sep 16, 2026	11-50	69 contacts →
	Indirect evidence “Back in 1946 when Guido Salvatori started a small local marble business in the area of Tuscany below the Carrara marble quarries, little he did know that 70 years later his…” Source: RevenueBase Database · checked Sep 16, 2026
4	Marmo Arredo SPA	Indirect evidence	Tombolo, ItalyHQ checked Sep 16, 2026	51-200	45 contacts →
	Indirect evidence “For over thirty years Marmo Arredo has been transforming marbles, granites, natural stones, and composite and agglomerate materials for building and interior design.” Source: RevenueBase Database · checked Sep 16, 2026
5	Nikolaus Bagnara S.P.A	Indirect evidence	Appiano, ItalyHQ checked Sep 16, 2026	51-200	43 contacts →
	Indirect evidence “Since the foundation in 1948 our goal has been to make private homes and commercial buildings more healthy and unique by using natural stones.” Source: RevenueBase Database · checked Sep 16, 2026
6	Abrasivi Adria S.R.L	Indirect evidence	Sant'ambrogio Di Valpolicella, ItalyHQ checked Sep 16, 2026	51-200	42 contacts →
	Indirect evidence “Abrasivi Adria is one of the Italian leading companies manufacturing abrasives, tools, accessories and many other items involved into marble, granite, engineered stone and ceramic…” Source: RevenueBase Database · checked Sep 16, 2026
7	Raselli Franco SPA	Indirect evidence	Valenza, ItalyHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “RASELLI FRANCO SPA is a luxury goods & jewelry company based out of ZONA ARTIGIANALE D 3 2, Valenza, Piedmont, Italy.” Source: RevenueBase Database · checked Sep 16, 2026
8	Conte Diamonds S.P.A	Indirect evidence	Milan, ItalyHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “Brand di gioielli classici artigianali made in Italy, realizzati con diamanti e pietre preziose naturali, disponibili nelle migliori gioiellerie.” Source: RevenueBase Database · checked Sep 16, 2026
9	Santamargherita	Indirect evidence	Volargne Di Dolce', ItalyHQ checked Sep 16, 2026	51-200	26 contacts →
	Indirect evidence “SANTAMARGHERITA®, one of the world leaders in the production of agglomerate stone, is a Verona based company that was founded in the mid 20th century.” Source: RevenueBase Database · checked Sep 16, 2026
10	Gismondi 1754 SPA	Indirect evidence	Genova, ItalyHQ checked Sep 16, 2026	11-50	25 contacts →
	Indirect evidence “Gismondi 1754 è un gruppo italiano che opera nel settore della creazione, produzione e vendita di gioielli di alta gamma con il proprio marchio.” Source: RevenueBase Database · checked Sep 16, 2026
11	Elite Stone Group	Indirect evidence	Dolcè, ItalyHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “Elite Stone Group is an Italian ultra-luxury natural stone brand specialized in extraction and production of high-quality stone coming from the own quarries as well from the most…” Source: RevenueBase Database · checked Sep 16, 2026
12	Marmo Elite SRL	Indirect evidence	Domegliara, ItalyHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Our image project reveals the core of our work.” Source: RevenueBase Database · checked Sep 16, 2026
13	BUDRI	Indirect evidence	Mirandola, ItalyHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Budri specialises in bespoke "turnkey" projects in marble, onyx and semi-precious stones, on five continents.” Source: RevenueBase Database · checked Sep 16, 2026
14	Savema S.P.A	Indirect evidence	Pietrasanta, ItalyHQ checked Sep 16, 2026	51-200	20 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
15	Simeg Marmi	Indirect evidence	San Severino Marche, ItalyHQ checked Sep 16, 2026	51-200	18 contacts →
	Indirect evidence “Since 1934, Simeg has been turning stone materials into bespoke products for indoor and outdoor furnishings.” Source: RevenueBase Database · checked Sep 16, 2026
16	World Jewellery Confederation - Cibjo	Indirect evidence	Milan, ItalyHQ checked Sep 16, 2026	1-10	18 contacts →
	Indirect evidence “The World Jewellery Confederation, or CIBJO (Confédération International de la Bijouterie, Joaillerie, Orfèvrerie des Diamants, Perles et Pierres), is the primary international…” Source: RevenueBase Database · checked Sep 16, 2026
17	Bonotti Marmi	Indirect evidence	Massa, ItalyHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “Bonotti Marmi è un punto di riferimento nel panorama internazionale della pietra naturale, con una solida presenza a Massa Carrara.” Source: RevenueBase Database · checked Sep 16, 2026
18	Marcolini Marmi S.P.A	Indirect evidence	Grezzana, ItalyHQ checked Sep 16, 2026	51-200	13 contacts →
	Indirect evidence “Over the last 50 years the Marcolini family has established Marcolini Marmi as one of the world’s leading suppliers of stone raw materials including marble, granite, onyx…” Source: RevenueBase Database · checked Sep 16, 2026
19	Marmi Rossi SPA	Indirect evidence	Cavaion Veronese, ItalyHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Produzione e vendita lastre di granito.” Source: RevenueBase Database · checked Sep 16, 2026
20	Stella Milano	Indirect evidence	Milano, ItalyHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “Nata a Milano nel 1952 dai fratelli Stella come impresa artigianale, Stella Milano oggi è un’affermata azienda orafa industriale “100% Made in Italy”.” Source: RevenueBase Database · checked Sep 16, 2026
21	Osigem S.R.L	Indirect evidence	Milano, ItalyHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Qualità, innovazione, professionalità, soddisfazione del cliente: questi sono gli elementi che contraddistinguono la Società Osigem S.r.l, azienda milanese che da oltre trentanni…” Source: RevenueBase Database · checked Sep 16, 2026
22	Zagross Marmi S.R.L	Indirect evidence	Chiaramonte Gulfi, ItalyHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Zagross is always looking for exclusive materials:(is a precious, mineral marble.” Source: RevenueBase Database · checked Sep 16, 2026
23	RED Graniti S.P.A	Indirect evidence	Massa, ItalyHQ checked Sep 16, 2026	201-500	9 contacts →
	Indirect evidence “The world leader in extracting and selling rough granite blocks worldwide now offering also slabs” Source: RevenueBase Database · checked Sep 16, 2026
24	Bassi & Bellotti S.P.A	Indirect evidence	Mariano Comense, ItalyHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “BASSI & BELLOTTI SPA was established in 1956, based on the experience of a Brianza family that had been making items for home décor out of Italian marble and granite for many…” Source: RevenueBase Database · checked Sep 16, 2026
25	Roberto Callegari	Indirect evidence	Padova, ItalyHQ checked Sep 16, 2026	11-50	8 contacts →
	Indirect evidence “OUR ROOTS The company Roberto Callegari was born in 1909 in Padua, Italy.” 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 414 gemstone manufacturers based in Italy

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Gemstone manufacturers based in Italy at a glance

As of Sep 16, 2026

23.2%Verified-email coverage

7.1Average contacts per company

11-50Median size (employees)

8.0%Largest-city concentration · Valenza

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

188

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for Italy, so it is reported there. Company counts and contact totals on this page are exact for Italy, over 414 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 Italy 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 Italy 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, 682 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 Valenza33

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 Italy?

RevenueBase identified 414 gemstone manufacturers headquartered in Italy 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?

Pomellato, headquartered in Milano, tops this list with the largest team on record.

Which city has the most gemstone manufacturers?

Valenza leads with 33 headquartered companies, followed by Carrara (19) and Milano (15).

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 682 verified decision-maker contacts tracked across these 414 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.