Hardness 9 specific gravity 3.80-4.05
Refractive index 1.76-78 birefringence 0.008-9
Wear: excellent durability
White sapphire is a kind of sapphire. Because of its pure composition of aluminum oxide, it does not contain any chromogenic elements and presents colorless and transparent crystal.
Generally speaking, "Sapphire" contains trace chromogenic elements, so the natural "white sapphire" with high purity and no hue is much rarer than people think.
"White sapphire" has "corundum luster". The colorless and transparent gem is a very beautiful white gem, which has been well cut and presents a texture like "ice sugar".