Origin
Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania
USA, Mexico, Tanzania, Brazil, Pakistan, Afghanistan, Origins: USA
Color
Blue, Violet, Greenish, Brown, Colorless, Yellow, gray
Green, Reddish, Brown, Yellow, Colorless, Blue, Violet, Grey
Streak
White
White
For which Rashi?
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Planet
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Element of Planets
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Energy
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How to Wear?
Finger
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Ring Metal
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Deities
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Not to wear with
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Powers
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Birthstone
Planetary
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Talisman
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Tenacity
Brittle
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Solubility
-
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Durability
-
-
Specific Gravity
2.57-2.663.26-3.36
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
Fair on {100}, poor on {001} and {010}
Good on {100}
Mohs Hardness
7-7.56.5-7
2
10
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Chemical Composition
Mg2Al4Si5O18
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references