At Diamond Foundry, we believe in the power of continually moving forward and embracing change. Evolving oneself. Evolving a relationship. Evolving diamonds.

We have evolved diamonds to be worthy of life's pivotal moments, to reflect the promise of the future, and not be diminished by uncertain origins.

Diamond Foundry
The Evolution of Diamonds.


Diamonds take hours to form in Earth (learn more). In our San Francisco foundry, it takes months via a gentler version of Earth's process.

Our founding team of M.I.T., Stanford, and Princeton engineers previously developed pioneering breakthroughs in solar power technology. They had a hunch that techniques used to harness the energy of the sun could also be used to make a better diamond, atom by atom.

We started by studying the laws of nature. Diamonds are born from a fiery heat, so we set out to create a plasma of unprecedented energy density. We coded software to run tens of thousands of physics-based simulations. In a warehouse just south of San Francisco, we built novel plasma reactors with hundreds of individually precision-engineered parts. Then, we formed plasma as hot as the outer layer of the sun.

It is far from easy to make diamond – most of our early experiments failed. But after years of effort, we were able to create the conditions in which nature forms diamond on its own.

Most simply, we discovered a fourth state of matter by which atoms can attach to nature's diamond crystal lattice and grow it in size. One by one, the atoms stack on top of a thin foundation of diamond, extending the unique crystal structure of diamonds extracted from the Earth. Atom by atom, it grows into a pure, jewelry-grade diamond of gem size. (We then slice off and reuse the starting material any number of times.)

We are now able to produce stunning diamonds in our San Francisco foundry. Each is a unique, one-of-a-kind crystal of pure diamond, just like mined diamonds -- but morally pure as well. Relative to industrial mining, our production is boutique; and unlike vast quantities of diamond extracted underground that Earth produced for free, our production is 0.001% rare.

We use solar power credits to reduce our carbon footprint to zero. We guarantee the impeccable provenance of our diamonds: each is born at our foundry in California.


Our rough diamond is each of unique shape, and when it exits the plasma, it is covered by a thin film of carbon.

The rough is then masterfully cut and polished into beautifully faceted gems. We offer the broadest choice of cuts because not everyone wants the standard round brilliant cut.

We only cut to the highest standards, without compromising on polished weight, because the quality of the cut is most important for the brilliance of a diamond.

Our master cutters are the world's best. One of our master cutters invented the Princess Cut, among other legendary contributions to the diamond industry. Our other master cutter directed the American School of Diamond Cutting and developed the Hearts on Fire premium cut brand.

Finally, a GIA Gemologist grades our diamonds, and we fully warrant this grading report. That is, you obtain a certificate, not just a lab report.

The ultimate diamond: Each Unique. American Origin. Fully Warranted. SHOP OUR DIAMONDS


With pure diamonds at hand at last, we searched for captivating pieces of timeless jewelry to feature them -- and we discovered master artisans and designers around the world who share our commitment to craftsmanship, sustainability, and originality.

Many of the most accomplished designers are independent and not employed by brands. More than a fashion trend, their work celebrates a principle of eternal quality with responsibility to the modern world.

Inspired by their work, we built an online destination featuring master artisans & designers and their bespoke designs.

All of our designer collaborations are with master artisans and designers who are recognized for their impeccable style, their attention to detail, and the quality and craftsmanship of their creations. Even if a photo may look similar to what you find on another website, the quality and weight of precious materials used are distinctly premium level.

Our diamond jewelry is a breathtaking mix of art, science, and nature. It is meant for people who envision a future that is bright, beautiful, and full of promise.

It’s meant for people like you.



R. Martin Roscheisen

R. Martin Roscheisen

Jeremy Scholz

Jeremy Scholz

Kyle Gazay

Kyle Gazay

VP Ops

Ritu Raj

SVP Sales
Alon Ben-Shoshan

Alon Ben-Shoshan

VP Commercial
Serin Kelley

Serin Kelley

GIA Gemologist
Jean Pigozzi

Jean Pigozzi

Board Advisor
Karla Otto

Karla Otto

Brand Advisor
Wendi Murdoch

Wendi Murdoch

Style & Art Council

“I’m proud to invest in Diamond Foundry Inc.– reducing the human and environmental toll of the diamond industry by sustainably culturing diamonds without the destructive use of mining.”

Leonardo DiCaprio Leonardo DiCaprio

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