Origin
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USA, Mexico, Tanzania, Brazil, Pakistan, Afghanistan, Origins: USA
Color
Black, Blue, Yellow, Green
Green, Reddish, Brown, Yellow, Colorless, Blue, Violet, Grey
Streak
Grey, Greenish, Brown
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
-
-
Birthstone
Planetary
-
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Talisman
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-
Tenacity
Brittle
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Solubility
-
-
Durability
-
-
Specific Gravity
3.28-3.443.26-3.36
1
7.18
👆🏻
Fracture
Uneven, Splintery
Conchoidal
Cleavage
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Good on {100}
Mohs Hardness
5.0-6.06.5-7
2
10
👆🏻
Chemical Composition
Na2Fe2+3Fe3+2Si8O22(OH)2
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous, Silky
Vitreous
Pleochroism
X = blue
Strong
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.680-1.6981.656-1.704
1
3.25
👆🏻
Optic Character
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Biaxial/+
Crystal System
monoclinic
Triclinic
Birefringence
0.005-0.0080.009-0.012
0
0.296
👆🏻
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
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Respiratory
Good
Good
Reproductive
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Digestive
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Psychology
Empowerment
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Clear Thinking
Balance