Synthetic Corundum

Synthetic corundum, sometimes also called synthetic sapphire, is a lab-created gemstone that is chemically identical to its natural counterpart.  Corundum includes such gemstones as Ruby and Sapphire.

Mineral: Corundum
Hardness (Mohs): 9
Refractive Index: 1.76–1.77
Density, g/cm3: 4
Dispersion: 0.018
Growth Method: Flame Fusion