Certified Lab Grown Diamonds

Shop Certified Lab-Grown Diamonds

Browse our live, continuously updated inventory of certified lab-grown diamonds below. Every stone is grown using the same crystallization process as a mined diamond — chemically, optically, and physically identical, just formed in weeks instead of over a billion years, and typically far less expensive than a comparable mined diamond of the same specifications. Use the search tool to filter by shape, carat weight, color, and clarity, then request to view any stone that catches your eye — our team will follow up with more details and next steps. Once you've found the one, we can set it into one of our handcrafted mountings or design a fully custom setting around it here at Gems by Gigi in Oceanside, CA.

Prefer a diamond already set in a ring? Browse our Lab-Grown Diamond Engagement Ring collection, including several pieces currently marked down as part of our closeout inventory. New to custom lab-grown diamonds? See our guide to choosing a custom lab-grown diamond jeweler in Oceanside/San Diego.

Frequently Asked Questions About Our Lab-Grown Diamonds

Are these diamonds independently certified? Yes — our lab-grown diamonds are independently graded and certified (commonly by IGI), verifying carat weight, cut, color, and clarity.

How is a lab-grown diamond different from a mined diamond? It has the same crystal structure and chemical composition as a mined diamond — the only difference is where it formed. It's a real diamond, not a simulant like cubic zirconia or moissanite.

How do I request to see a specific stone? Use the search tool below to find a stone you like, then submit a request to view it — our team will follow up with more details and next steps.

Can I have a lab-grown diamond set into a custom ring? Yes — this is one of our specialties. Pair it with one of our mountings or let us design something fully custom around it.