Origin
Southern and central Africa
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Color
Yellow, Blue, Black, Green, gray
Brownish, Black
Streak
White
Brown
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
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Solubility
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Durability
-
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Specific Gravity
3.43-3.443.26
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
None Observed
None
Mohs Hardness
6.5-7-9999
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
Luster
Vitreous
Resinous
Pleochroism
visible
Strong: yellow-brown
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
Translucent
Refractive Index
1.696-1.702-9999
1
3.25
👆🏻
Optic Character
-
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Crystal System
Triclinic
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Birefringence
0.005-9999
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
Physical
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
Emotional healing
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Qualities Associated
Transformation
Protection