Certified Lab Grown Diamonds

Shop Certified Lab-Grown Diamonds

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. Tell us what you're looking for below — shape, carat, color, clarity, budget — and Gigi will personally hand-select a few real stones that match, then email you back photos, videos, and pricing so you can see exactly what you're getting before you decide. 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 a quote on a specific stone? Fill out the quote form below with your preferences on shape, carat weight, color, and clarity. Gigi will hand-select real stone options matching what you're after and email you back photos, videos, and pricing — no guesswork, no generic listings.

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.

Having trouble with the form below? Call Gigi directly at (323) 999-1436, or reach out here — happy to help you find the right stone.

Looking for a natural diamond instead? We also have access to GIA-certified natural diamonds — just note that on the quote form and we'll follow up with options.