Diamond Foundry is a San Francisco-based laboratory-grown diamond producer founded in 2012 by Martin Roscheisen and a group of investors that prominently included the actor Leonardo DiCaprio. The company produces gem-quality diamonds by chemical vapour deposition (CVD) at production facilities in California and Washington State, marketing them under the Diamond Foundry brand and through several downstream jewellery brands including the lifestyle-positioned VRAI. Among laboratory-grown producers, Diamond Foundry has been distinctive for its use of solar-powered manufacturing (positioning the product as zero-emission), its early adoption of CVD over HPHT methods, and its public profile through the DiCaprio investment and his outspoken advocacy for laboratory-grown over mined diamonds.

Founding and growth

The company was founded in 2012 with funding from Twitter co-founder Evan Williams, Andreessen Horowitz, and other Silicon Valley investors, including DiCaprio, who joined as an investor and public spokesperson. The 2012 founding placed Diamond Foundry among the second wave of CVD producers - after the original Apollo, Gemesis, and Element Six work of the 2000s - and the company benefited from the maturation of CVD technology that allowed economically viable production of one-carat-and-larger gem-quality stones. The company's marketing emphasised the environmental case for laboratory-grown diamonds: the use of solar power, the absence of mining-related land disturbance, the avoidance of conflict-diamond and human-rights concerns associated with parts of the natural-diamond supply chain.

Auction-house standing

Diamond Foundry, despite the framing implied by the parent term in this dictionary, is a producer rather than an auction house. The company sells through its own brand and through retail partners, and laboratory-grown diamond auctions in the strict sense have remained a small subset of the overall trade, with most laboratory-grown stones moving through retail channels rather than auction. Major auction houses including Christie's, Sotheby's, and Bonhams have included occasional laboratory-grown lots in their sales, particularly large or distinctive stones with marketing appeal, but a dedicated laboratory-grown auction segment has not developed in the way the natural-diamond auction segment has. Diamond Foundry has periodically released large or notable stones for promotional sale through partner channels, but the firm's principal business remains the steady production of gem-quality melee and feature stones for the jewellery market.

Place in the laboratory-grown segment

Diamond Foundry sits within a laboratory-grown segment that has expanded rapidly since the mid-2010s and that now accounts for a substantial fraction of the global engagement-ring market in the United States. The principal competitors include the Indian-listed Bhanderi Lab Grown Diamonds and Greenlab Diamonds, the De Beers-backed Lightbox brand (launched 2018 with a flat-rate pricing model), the Chinese producers including Zhengzhou-based and Henan-based plants, and a number of smaller American producers. Diamond Foundry's position has been distinguished by its consumer-facing brand strategy and the high public profile of its DiCaprio association, and it has functioned as one of the more visible US-based players in a segment that is increasingly dominated by Indian and Chinese production volume.

Disclosure and grading

Diamond Foundry stones are sold with full disclosure of their laboratory-grown origin and are typically graded by IGI, GCAL, or other major laboratories that issue grading reports for laboratory-grown diamonds. The reports note the CVD origin and follow the same four-Cs grading vocabulary used for natural diamonds, with explicit identification of the laboratory-grown status on the face of the report. The CIBJO and FTC disclosure requirements for laboratory-grown diamonds are met by the company's labelling and marketing practices.