Product Description

CHEMISTRY ASSESMENT
CHEMISTRY             - Al2O3
CRYSTALLOGRAPHY—  Hexagonal
REFRACTIVE INDEX—   1.****1.**9
HARDNESS—                     9.1
SPECIFIC GRAVITY   —   3.***4.0
 CLEAVAGE       -                 None
HEAT SENSITIVE      —     No

The blue Sapphire a mineral compose of the gas oxygen and the light metal (Aluminum).
The marvelous color of Sapphire is due to the traces  of a metallic oxide incorporated in the stone as an impurity.
Its luster is glass like and is scientifically termed vitreous .
However, this gem stone formed in molten rock found around the world from alkali basalts sometimes known as  flood basalts that are widely spread in volcanic regions.
These  basalts contains nodules containing sapphire or volcanic “bomb” of olivine (peridot) that are thought to represent broken fragments of the Earth’s upper mantle.
Sapphire including other gem stones are buried into the alluvial deposits and exposed to surface during floods and excavation work by human beings and other constructions.