Origin
Southern and central Africa
Southern and central Africa
Color
Violet, Black
Colorless
Streak
gray, White
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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
3.17-9999
1
7.18
👆🏻
Fracture
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Conchoidal
Cleavage
None
None
Mohs Hardness
75.5-6.5
2
10
👆🏻
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Luster
Vitreous
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Pleochroism
Strong: pale lavender dark blueAnthony et al
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Dispersion
0.020.01
0.005
1
👆🏻
Transparency
TranslucentAnthony et al, Translucent
Transparent
Refractive Index
-99991.37-1.52
1
3.25
👆🏻
Optic Character
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Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
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Birefringence
-9999-9999
0
0.296
👆🏻
Clarity
TranslucentAnthony et al
Transparent
Physical
Neurological
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Enhances mental clarity and focus
Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
Empowerment
Clarity
Healing
Emotional healing
Emotional healing
Qualities Associated
Emotional Healing
Clarity