Origin
Southern and central Africa
Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania
Color
Colorless, Greenish, Green, gray, Yellow
Blue, Violet, Greenish, Brown, Colorless, Yellow, gray
Streak
White
White
For which Rashi?
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-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
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Not to wear with
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Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.21-3.382.57-2.66
1
7.18
👆🏻
Fracture
Irregular/uneven, Uneven
Subconchoidal, Conchoidal
Cleavage
Perfect on {001}
Fair on {100}, poor on {001} and {010}
Mohs Hardness
6-77-7.5
2
10
👆🏻
Chemical Composition
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Mg2Al4Si5O18