Origin
Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania
Sri Lanka, Burma, USA, Russia
Color
Blue, Violet, Greenish, Brown, Colorless, Yellow, gray
Yellow, Brown, pink, Colorless
Streak
White
White
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.57-2.663.46-3.50
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
Fair on {100}, poor on {001} and {010}
Perfect
Mohs Hardness
7-7.56-7
2
10
👆🏻
Chemical Composition
Mg2Al4Si5O18
MgAlBO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references