1 Astrology
1.2 Origin
Afghanistan, Southern and central Africa
Madagascar, Tanzania
1.4 Color
Blue, Greenish, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet
1.6 Streak
Blue, White
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1.8 For which Rashi?
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1.10 Planet
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1.11 Element of Planets
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1.13 How to Wear?
1.14.2 Finger
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1.14.3 Ring Metal
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1.15 Energy
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1.17 Deities
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1.19 Not to wear with
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1.21 Powers
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1.23 Birthstone
1.24.1 Planetary
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1.24.4 Talisman
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3 Physical Properties
3.2 Tenacity
3.4 Solubility
3.6 Durability
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3.8 Specific Gravity
3.9 Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
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3.11 Cleavage
Imperfect on {110}
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3.13 Mohs Hardness
3.15 Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
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4 Optical Properties
4.1 Luster
4.2 Pleochroism
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5.2 Dispersion
5.5 Transparency
Gemmological Tables (2004) More from other references
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5.6 Refractive Index
5.9 Optic Character
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5.10 Crystal System
5.11 Birefringence
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0
0.296
5.15 Clarity
Gemmological Tables (2004) More from other references
Color grading system
6 Benefits
6.1 Physical
6.1.1 Neurological
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6.1.2 Cardiovascular
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6.1.3 Respiratory
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6.1.4 Reproductive
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6.1.5 Digestive
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6.2 Psychology
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6.3 Healing
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6.4 Qualities Associated
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