Origin
USA, Mexico, Tanzania, Brazil, Pakistan, Afghanistan, Origins: USA
Russia
Color
Green, Reddish, Brown, Yellow, Colorless, Blue, Violet, Grey
Colorless, Brownish
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
-
Nearly insoluble in HCl and HNO3
Durability
-
-
Specific Gravity
3.26-3.362.97
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Good on {100}
Distinct on {010}
Mohs Hardness
6.5-76
2
10
👆🏻
Chemical Composition
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
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Luster
Vitreous
Greasy, Vitreous, Pearly
Pleochroism
Strong
(x): colorless. (y): colorless. (z): colorless.
Dispersion
0.020.01
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.656-1.7041.607
1
3.25
👆🏻
Optic Character
Biaxial/+
-
Crystal System
Triclinic
monoclinic
Birefringence
0.009-0.012-9999
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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Physical
Neurological
Enhances mental clarity and focus
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Cardiovascular
-
-
Respiratory
Good
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Reproductive
-
-
Digestive
-
-
Psychology
Harmony
-
Healing
Emotional healing
Physical healing
Qualities Associated
Balance
Protection