The House of Cassienne

Brilliance, Honestly Made

We believe extraordinary sparkle shouldn't demand an extraordinary price — or an extraordinary cost to the earth.

In 1893, in the crater of a fallen meteorite in Arizona, chemist Henri Moissan discovered crystals that burned with more fire than any diamond he had ever seen. Nature had made almost none of it. So science learned to finish what the stars began.

Cassienne was founded on a simple conviction: the most brilliant stone on earth shouldn't be the most compromised one. Moissanite refracts more light than a mined diamond, wears just as hard through a lifetime of everyday moments, and is grown — not dug — into existence.

Every piece in our boutique is set by hand, certified, and delivered with a lifetime guarantee of its fire. No mines. No markups measured in multiples. Just light, kept honest.

Why Moissanite

The Educated Choice

Side by side, moissanite doesn't just keep up with mined diamond — in the ways you can actually see, it leads.

	Moissanite	Mined Diamond
Brilliance (refractive index)	2.65	2.42
Fire (dispersion)	0.104 — rainbow flashes	0.044
Hardness (Mohs scale)	9.25	10
Clouds or dulls over time	Never	Can accumulate film
Origin	Lab-grown, conflict-free	Mined, origin varies
Price per carat	Up to 90% less	Premium

Experience the Fire

Champagne moissanite cluster ring in braided gold

Our Promises

What We Stand Behind

Certified, Always

GRA certification with every significant stone. What we say it is, it is.

Ethical by Design

Lab-grown stones and recycled metals wherever we can source them.

Guaranteed for Life

If your moissanite ever loses its brilliance, we replace it. Full stop.

Honest Pricing

Direct from our ateliers to you. No middlemen, no mystery multiples.