Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide Al2O3 with trace amounts of elements such as iron, titanium, chromium,copper, or magnesium. Category: Oxide mineral Formula: Aluminium oxide, Al2O3 Crystal system: Trigonal Crystal class: Hexagonal scalenohedral Mohs scale hardness: 9.0 Luster: Vitreous Specific gravity: 4.0 ~ 4.1 Sapphire is the birthstone for September Lavender Sapphire is attractive colour type of corundum family.
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide Al2O3 with trace amounts of elements such as iron, titanium, chromium,copper, or magnesium. Category: Oxide mineral Formula: Aluminium oxide, Al2O3 . Sapphire is the birthstone for September. Lavender Sapphire is attractive colour type of corundum family.
