1 Astrology
1.1 Origin
1.2 Color
Blue, White, Grey, Yellow, Green, Colorless, Red, gray
Colorless, White, Blue, Colorless, gray, Green, Yellow, White
1.3 Streak
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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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
2.2 Solubility
Gelatinises in acids
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Uneven, Conchoidal, Brittle
Irregular/uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
2.6 Cleavage
Distinct on {110}
Perfect on {10 1 0}, poor on {0001}
2.7 Mohs Hardness
2.8 Chemical Composition
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
Na 2Ca 2Al 6Si 6O 24(CO 3) 2Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
Vitreous, Greasy
Vitreous, Greasy, Pearly
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
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Transparent
3.5 Refractive Index
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
Not Available0.012-0.025
0
0.296
3.9 Clarity
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Transparent
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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