Yet even though it's comprised of a different mineral, moissanite is also incredibly resilient. "Moissanite is the second hardest to diamonds on the Mohs hardness scale," O’Connell says.

Moissanite, white sapphires, and white aquamarines are three of the most popular diamond alternatives Gem specialist Benjamin Khordipour of Estate Diamond Jewelry told Insider that moissanite has ...

They can buy a ring that appears to cost $20,000 for a fraction of the cost." Kristin Coffin, another jeweller working with the stone, is now selling more moissanite than diamond pieces.