LEONARDO DICAPRIO - "I’m proud to invest in Diamond Foundry Inc. – cultivating real diamonds in America without the human & environmental toll of mining."

Real Diamonds. Cultivated in our San Francisco Foundry.

Impeccable provenance

Our diamonds are created in San Francisco in a foundry that re-creates the way in which Earth forms diamond.

Unlike earth extraction from underground in Africa or Russia, ours are mined above the ground in America using modern-day technology & craftsmanship.

While diamonds generally pass through a dozen owners with an origin impossible to trace, our diamonds are guaranteed from us and not pre-owned.

For a diamond as rock solid as your values.

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Each Unique & Rare

Just like ice from a freezer is as real as ice from a winter roof, ours are real diamonds. The only difference is origin — and the reassurance that it was created in America without questionable practices.

Our diamonds are very rare. Fewer than 0.01% of all diamonds are ours. That's because our production is 1,000 harder to scale than industrial mining.

Each diamond grows in its own way, with one-of-a-kind inclusions and unique growth patterns. No two man-made diamonds are alike. Each is unique to the core.

Masterfully Cut

We cut diamonds always to excellent proportions so they have maximal brilliance. We never compromise cut quality for carat weight. Our polishing operation is focused on quality and supervised by third-generation master cutters who hail from Antwerp, Belgium.

One of our master cutters even invented the Princess Cut, the second most popular diamond cut.


We offer all classic cuts as well as special master cuts developed by us.

Uncompromising Quality

We cut for excellent quality, not for optimized weight.


Each diamond is graded by a GIA Gemologist according to the strictest professional standards.

We certify & warrant the reported Cut, Color, Clarity, and Carats.

We even guarantee 100% of your diamond's value.

We look forward to hearing from you. If you would like to speak by phone, please leave a call-back number in your message.

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