Origin
USA, Mexico, Tanzania, Brazil, Pakistan, Afghanistan, Origins: USA
Canada, Russia, Kenya, Brazil, Norway
Color
Green, Reddish, Brown, Yellow, Colorless, Blue, Violet, Grey
Green, Greenish, Black, Reddish, Brown
Streak
White
Yellow, Yellowish-grey, gray
For which Rashi?
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Pisces
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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Healing
Birthstone
Planetary
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Talisman
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Tenacity
-
Brittle
Solubility
-
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Durability
-
-
Specific Gravity
3.26-3.363.50-3.60
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Good on {100}
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Mohs Hardness
6.5-76
2
10
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Chemical Composition
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.