1 Astrology
1.1 Origin
Not Available, Southern and central Africa
Southern and central Africa
1.2 Color
Violet, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
1.3 Streak
gray, White, gray, White
Not Available
1.4 For which Rashi?
Not Available
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1.5 Planet
Not Available
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1.6 Element of Planets
Not Available
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1.7 How to Wear?
1.7.1 Finger
Not Available
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1.7.2 Ring Metal
Not Available
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1.8 Energy
Not Available
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1.9 Deities
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1.10 Not to wear with
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1.11 Powers
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1.12 Birthstone
1.12.1 Planetary
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1.12.2 Talisman
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2 Physical Properties
2.1 Tenacity
Not Available
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2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
2.5 Fracture
Handbook of mineralogy (2001)
Not Available
2.6 Cleavage
2.7 Mohs Hardness
2.8 Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Not Available
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Strong: pale lavender dark blueAnthony et al
Not Available
3.3 Dispersion
3.4 Transparency
TranslucentAnthony et al, Translucent
Not Available
3.5 Refractive Index
Not AvailableNot Available
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
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3.8 Birefringence
Not AvailableNot Available
0
0.296
3.9 Clarity
TranslucentAnthony et al
Not Available
4 Benefits
4.1 Physical
4.1.1 Neurological
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4.1.2 Cardiovascular
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4.1.3 Respiratory
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4.1.4 Reproductive
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4.1.5 Digestive
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4.2 Psychology
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4.3 Healing
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4.4 Qualities Associated
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