What Diacore does

Diacore is a privately held multinational diamond company founded in 1950, headquartered in Geneva, Switzerland, that specializes in sourcing, cutting, and polishing rare and exceptional large diamonds. The company operates state-of-the-art manufacturing facilities in four countries: Johannesburg, South Africa (since 1988); Windhoek, Namibia (since 1998); New York, United States (since 1999); and Gaborone, Botswana (since 2008). These facilities deploy advanced cutting equipment, master craftsmen, and RFID-enabled inventory systems, with the New York site purpose-built for crafting rare, large stones. Diacore's product portfolio spans rough and polished diamonds, with documented world-record stones including the De Beers Millennium Star (203.04 carats), the CTF Pink Star (59.60 carats, sold for US$71.2 million in 2017), the De Beers Blue (15.10 carats, sold for US$57.5 million), and numerous other exceptional fancy coloured and Type IIa diamonds.

Diacore generates revenue through three primary channels: direct sales of rough and polished diamonds globally, contract cutting and polishing services for major mining companies including De Beers, and a joint venture with Sotheby's known as Sotheby's Diamonds, which operates a by-appointment private retail service in London, New York, and Hong Kong. Pricing is not publicly disclosed; marquee stones are sold via competitive auction bidding through Sotheby's, while the company maintains ethical sourcing certifications under the Kimberley Process, Responsible Jewellery Council, Forevermark Programme, and Best Practice Principles. The primary customer segments are ultra-high-net-worth collectors, premier auction houses, and major diamond miners seeking expert cutting of rare discoveries.

Name

Diacore

Legal name

Diacore

Website

https://diacore.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Diacore is a privately held, Geneva-based multinational diamond company founded in 1950 that cuts and sells rare, exceptional large diamonds via four-country manufacturing operations, the Sotheby's Diamonds joint venture, and premier auction channels serving ultra-high-net-worth collectors and luxury houses.

Ownership category

akta.pro rank

Product category

Luxury Diamond Manufacturing

NAICS

Cut Stone and Stone Product Manufacturing (327991)

SIC

Wholesale-Jewelry, Watches, Precious Stones & Metals (5094), Jewelry, Silverware & Plated Ware (3910), Jewelry, Precious Metal (3911)

akta.pro primary industry

Diamond Cutting & Polishing (Manufacturing) (CRAKAJAA)

akta.pro secondary industries

Rough Diamond Trading & Brokerage (CRAKAJAC), Polished Diamond Trading & Brokerage (CRAKAJAD), Diamond Jewelry (CRAKAAAA)

Keywords

• Diamond manufacturing
• Rough diamonds
• Polished diamonds
• Diamond cutting services
• Rare colored diamonds

Headquarters

HQ city

Geneva

HQ country

Switzerland

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Infrastructure, Operations, Technology or R&D

Revenue model

1. Rough and Polished Diamond Sales: Diacore provides rough and polished diamonds to customers around the world through manufacturing facilities and direct sales channels.
2. Sotheby's Diamonds Joint Venture: Joint venture with Sotheby's offering rarest and most desirable diamonds set in exquisitely designed jewellery. By-appointment only private service available in London, New York, and Hong Kong.
3. Diamond Manufacturing Services: Contract cutting and polishing services for exceptional diamonds, including partnership with De Beers for blue diamond processing.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Diacore is a multinational diamond manufacturer that sources, cuts, and polishes rough and polished diamonds through state-of-the-art facilities in South Africa, Botswana, Namibia, and the United States. The company specializes in crafting rare, exceptional large and colored diamonds (e.g., De Beers Millennium Star, Pink Star, De Beers Blue, Williamson Pink Star) for premier auction houses and ultra-high-net-worth collectors. Through its Sotheby's Diamonds joint venture, Diacore also distributes finished bespoke diamond jewelry via by-appointment showrooms in London, New York, and Hong Kong, and provides contract cutting and polishing services for major mining partners including De Beers.

Product overview

Diacore is a multinational diamond company providing rough and polished diamonds to customers worldwide, with manufacturing facilities in Botswana, South Africa, Namibia, and New York. The company specializes in crafting rare, exceptional diamonds including The Pink Star (59.60-carat fancy vivid pink), De Beers Millennium Star (203.04-carat), The Infinite Blue (11.28-carat fancy vivid blue), Williamson Pink Star (11.15-carat), The Eternal Pink (10.57-carat), 102.39-Carat Oval Diamond, 88.22-Carat Oval Diamond, and numerous other world-class stones. The Sotheby's Diamonds joint venture combines Diacore's diamond cutting and polishing expertise with Sotheby's international client base for a by-appointment private jewelry service in London, New York, and Hong Kong. The company also produces Forevermark-branded jewelry pieces and maintains partnerships with leading auction houses for exceptional diamond sales.

Differentiator

Problem solved

Functional benefit

Brands

• Sotheby's Diamonds: Joint venture between Diacore and Sotheby's offering the rarest and most desirable diamonds set in exquisitely designed jewellery. By-appointment only private service available in London, New York and Hong Kong.

Products and services

• Rough and Polished Diamonds Core supply offering providing rough and polished diamonds to customers worldwide, specializing in rare and exceptional large diamonds sourced from prestigious mines including Cullinan, Jwaneng, and Williamson. Sold through direct sales channels and via manufacturing facilities in South Africa, Botswana, Namibia, and the United States.
• Sotheby's Diamonds Joint Venture Joint venture with Sotheby's offering the rarest and most desirable diamonds set in exquisitely designed jewelry through a by-appointment-only private service operating in London, New York, and Hong Kong. Combines Diacore's cutting and polishing expertise with Sotheby's international client base.
• Diamond Manufacturing Services (Contract Cutting and Polishing) Contract cutting and polishing services for exceptional diamonds, including partnership processing of rare blue diamonds for De Beers from the Cullinan Diamond Mine. Delivered via state-of-the-art manufacturing facilities in South Africa, Botswana, Namibia, and the United States.

Quantifiable outcome

• 88.22-carat oval diamond sold for HK$108 million / US$13.8 million, establishing per carat price of HK$1,224,133
• +3 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

14 partnerships are on record, tiered core and minor.

• Sotheby'scoreStrategic or Co-development PartnerSotheby's and Diacore created Sotheby's Diamonds - a major joint venture offering the rarest and most desirable diamonds set in exquisitely designed jewellery. Combines Diacore's cutting expertise with Sotheby's connoisseurship and international client base. By-appointment service available in London, New York, and Hong Kong.
• De Beers GroupcoreStrategic or Co-development PartnerDe Beers and Diacore have teamed up for multiple exceptional blue diamond purchases from the Cullinan Diamond Mine. Split purchase of 39.34-carat blue diamond for US$40.18 million equally between companies. Previous partnership in November 2020 for five rare blue diamonds totaling 85.62 carats.
• ForevermarkminorStrategic or Co-development PartnerDiacore is committed to standards of the Forevermark Programme and is subject to regular audits for compliance. Partnership includes collaborative jewellery creations like White Light brooch featuring 13 D-colour internally flawless pear-shaped Forevermark diamonds.
• Responsible Jewellery CouncilminorOthersDiacore is committed to standards of the Responsible Jewellery Council and is subject to regular audits to guarantee compliance with ethical sourcing standards.
• Kimberley ProcessminorOthersDiacore is committed to complying with the rules and regulations of the Kimberley Process and all requirements of the World Diamond Council to combat conflict diamonds.
• JaguarminorGTM or Marketing PartnerCarbon, the common element of diamonds and Formula One Cars, led to the long association between Diacore Diamonds and Jaguar. Collaboration on Flawless Engineering Weekend at Monaco Grand Prix.
• Vodafone McLaren MercedesminorGTM or Marketing PartnerPartnership leveraging synergies between high-performance race cars and finely crafted diamonds. Diamond studded helmets, steering wheels, nose cones and F1-inspired diamond jewellery unveiled at Monaco Grand Prix.
• MoussaieffminorGTM or Marketing PartnerJoint presentation with Scarlett Johansson at BAFTA London Party in February 2004. Specially designed diamond-studded award presented to the actress.
• Shaun LeaneminorStrategic or Co-development PartnerCollaboration with Shaun Leane for Forevermark White Light collection. Watch the making of exquisite diamond earrings named Sonnet.
• Ron AradminorStrategic or Co-development PartnerRon Arad created 'Last Train' artwork in response to Diacore's initiative and commission to create a work of art incorporating diamonds. Part of 55th Venice Biennale exhibition.
• Venice Biennale ArtistsminorStrategic or Co-development Partner55th Venice Biennale exhibition 'Last Train' included works by Francesco Clemente, Anthony Gormley, Christian Marclay, David Shrigley, Cornelia Parker, Richard Wilson, Robert Wilson, Sara Fanelli, Sue Webster and Tim Noble, Leandro Erlich and Gavin Turk.
• Smithsonian National Museum of Natural HistoryminorGTM or Marketing PartnerSplendor of Diamonds exhibition at the Smithsonian in June-September 2003. Seven unique fancy colored diamonds from all corners of the world exhibited alongside the Hope diamond.
• Natural History Museum LondonminorGTM or Marketing PartnerDiamonds exhibition created jointly with Diamond Trading Company tracing diamond's journey from mine to consumer. De Beers Millennium Star, Pink Star and Alnatt Yellow were unveiled.
• Joburg BalletminorGTM or Marketing PartnerDiacore hosted international Joburg Ballet for VIP invitational performances in Gaborone between March 22-23, 2015. Three performances showcasing ballet alongside Botswana's Riza Ballet School.

Scale indicators3 records

Recent moves2 records

Expansion highlights5 records

Direct peers

• Rosy Blue: One of the world's largest diamond manufacturing and trading groups, with cutting operations across multiple countries. Highly comparable to Diacore as a multinational diamond manufacturer serving global luxury and wholesale demand.
• KGK Group: Vertically integrated diamond mining-to-jewelry group with manufacturing hubs in India, Botswana, and other locations. Directly comparable to Diacore's multi-country cutting operations and global wholesale model.
• Venus Jewel: India-headquartered manufacturer specializing in large and high-value polished diamonds, including exceptional stones. Comparable to Diacore in expertise around rare, large diamonds for the global luxury market.
• Harry Winston: Iconic high-end diamond jewelry brand historically tied to many of the world's most famous diamonds. Comparable to Diacore in luxury positioning, UHNW clientele, and involvement with exceptional stones.
• Diarough: Global diamond manufacturer with cutting and polishing facilities in Asia and Africa. Comparable to Diacore as a large-scale diamond manufacturer serving international jewelry brands and collectors.
• Mouawad: Multi-generational diamond cutter and luxury jeweler known for exceptionally rare stones and high-end jewelry. Closely comparable to Diacore in combining master craftsmanship of exceptional diamonds with a luxury retail brand.
• Graff: Luxury diamond house famous for handling some of the world's most important diamonds and high jewelry. Directly comparable to Diacore in serving UHNW collectors with exceptional stones and bespoke pieces.

Others

• Christie's: Global auction house competing with Sotheby's in the sale of exceptional colored and colorless diamonds. Comparable to Diacore through shared UHNW clientele and auction-driven demand for rare stones.
• Lucara Diamond Corp: Owner of the Karowe mine, source of many large exceptional rough stones including the 1,109-carat Lesedi La Rona. Indirectly comparable to Diacore as an upstream supplier of the type of rare rough Diacore specializes in cutting.

Broad incumbents

• De Beers Group: World's leading diamond miner and Diacore's strategic partner. Overlaps with Diacore in exceptional-stone production and the Forevermark ecosystem, but operates as a broad incumbent across the entire diamond value chain rather than focusing on rare-diamond cutting.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/diacorediamonds
• LinkedInlinkedin.com/company/diacore-group

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Diacore