Moissanite engagement ring

Moissanite is a rare mineral with a hexagonal crystal structure that occurs in iron-nickel meteorites, and may also be called silicon carbide or carborundum in reference to its chemistry. Naturally occurring moissanite crystals are too miniscule for use in jewelry, and it wasn't until a lab process was created to grow large, single crystals that moissanite became a practical choice for engagement rings and other adornments.