Sapphire

Hardness ( Moh )

" 9

Crystal System

Trigonal

Specific Gravity

3.95 - 4.00

Refractive Index

1.762-1.770

Birefringence

Family

Corundum

Colour(s)

Blue, Red, Yellow, Brown, Gray

Cleavage

Francture Type

Conchoidal

Luster

Streak

None

Transparency

Transparent to translucent

Formula

Al2O3

Country

Found In Afghanistan,Antarctica,Argentina,Australia,Austria,Brazil,Cambodia,Cameroon,Canada,Chile,China,Colombia,Czech Republic,DR Congo,France,Germany,Greece,Hungary,India,Indonesia,Ireland,Israel,Italy,Japan,Kenya,Kyrgyzstan,Laos,Madagascar,Malawi,Mongolia,Myanmar,Nepal,New Zealand,Nigeria,North Macedonia,Pakistan,Poland,Portugal,Russia,Rwanda,Slovakia,Somaliland,Sri Lanka,Switzerland,Tajikistan,Tanzania,Thailand,UK,USA,Vietnam,Zimbabwe