1 Astrology
1.1 Origin
Not Available
Not Available, Southern and central Africa
1.2 Color
1.3 Streak
Not Available
gray, White, gray, White
1.4 For which Rashi?
Aquarius, All, Taurus, Aquarius, All, Taurus, Aquarius
Not Available
1.5 Planet
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1.6 Element of Planets
1.7 How to Wear?
1.7.1 Finger
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Not Available
1.7.2 Ring Metal
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1.8 Energy
Projective, Receptive
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1.9 Deities
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
Not Available
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
Not Available
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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