1 Astrology
1.1 Origin
Not Available
Not Available, Southern and central Africa
1.2 Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Violet, Black
1.3 Streak
Not Available
gray, White, gray, White
1.4 For which Rashi?
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1.5 Planet
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1.6 Element of Planets
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Not Available
1.7 How to Wear?
1.7.1 Finger
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1.7.2 Ring Metal
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1.8 Energy
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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
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Not Available
Handbook of mineralogy (2001)
2.6 Cleavage
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
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Strong: pale lavender dark blueAnthony et al
3.3 Dispersion
3.4 Transparency
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TranslucentAnthony et al, Translucent
3.5 Refractive Index
Not AvailableNot Available
1
3.25
3.6 Optic Character
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3.7 Crystal System
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Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
3.8 Birefringence
Not AvailableNot Available
0
0.296
3.9 Clarity
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TranslucentAnthony et al
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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