Sapphire-gemstone

Sapphire is the most precious and valuable blue gemstone. it is very desirable gemstone due to its excellent color , hardness, durability, and luster. in the gem trade, sapphire without any color prefix refers to the blue variety of the mineral corundum.however , the term sapphire encompasses all other gem variety and colors of corundum as well, excluding Ruby, the red
variety of corundum, which has its own name since antiquity.this stone have most powerful  powers .which person put in hand he become great in all eyes. or become rich in days. the person who born in September can use this as gemstone.



Chemical Formula: Al/2O/3

Color                    : ,Blue,Green,Multicolored,,yellow,orange,brown,pink.purple,gray,black,white

Hardness              : 9

Crystal system      : Hexagonal

Refractive index   : 1.76-1.77

SG                        : 3.9 - 4.1

Transparency        : Opaque

Double Refraction: .0008

Luster                   :  vitreous to adamantine

Cleavage              :  None

Mineral Class       :  Corundum

Sources:
                 Important sapphire sources include Sri Lanka , Thailand, Cambodia, India/Pakistan was famous for its Kashmir-blue sapphire.