Crescent Moon - IGI Certified Coffin Cut Lab Diamond Infinity Galaxy Engagement Ring

Every lab-grown diamond we ship comes with a full IGI certificate. Our standard range is D color, VS1 to VVS2 — the top of the lab-grown market, not the entry level. Most of what's sold online sits two to four grades below that, and the price gap you see elsewhere is usually just that difference. Need something else? Everything we sell is fully customizable — the setting, the clarity range, the carat weight. Or skip the setting entirely and just pick a loose stone that fits your budget.

What a Lab-Grown Diamond Is

A lab-grown diamond is a real diamond. Chemically, physically, and optically it is identical to a mined one — same carbon crystal structure, the same 10 on the Mohs scale, same way it handles light. The only difference is how it forms: in a controlled chamber using CVD or HPHT, over weeks instead of billions of years.
Because it is a real diamond, it's graded like one. The 4Cs — cut, color, clarity, carat — apply exactly as they do to mined stones, and the grading is done by an independent lab, not by us.

Our Standard: D · VS1–VVS2 · IGI

· Color: D. The top of the colorless scale. Not G, not 'near colorless' — no yellow tint, even under magnification.
· Clarity: VS1 to VVS2. Inclusions so slight they're invisible to the eye and hard to find even at 10× magnification.
· Certification: IGI on every stone. The International Gemological Institute is one of the world's leading independent gem labs.
We hold to this range because cut only reads properly when color and clarity are high enough to stay out of the way.
Everything else is available by custom order. Setting, color range, clarity, carat, budget — tell us what you need. Start from a loose stone or start from a design: pick the stone first and set it later, or start with the setting and match a stone to it. Every lab-grown diamond we sell can be built to spec. Custom isn't a special request here — it's how we normally work.

Beyond Colorless

Not everyone wants the standard answer. Alongside our colorless range, we carry colored lab-grown diamonds — green, pink, blue, yellow, and deeper fancy tones — for people who never wanted a white stone to begin with. Same certification standard, same clarity range, different intent. Colored stones are customizable too.
If the ring you're designing shouldn't look like everyone else's, start here.