1 Astrology
1.1 Origin
Sri Lanka, India, Brazil
USA
1.2 Color
Green, Brown, Brown, Colorless, Green, gray, Yellow
Colorless, White, Green, White, Green, Brown, Colorless, Green, White, White
1.3 Streak
Brownish, White, Brownish, White
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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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
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Easily soluble in cold dilute HCl
2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Brittle, Uneven, Brittle, Uneven
2.6 Cleavage
none
Good in two directions parallel to the prism faces {110}
2.7 Mohs Hardness
2.8 Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaZn(AsO4)(OH)
3 Optical Properties
3.1 Luster
Greasy, Vitreous
Subadamantine, Silky, Fibrous
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
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3.5 Refractive Index
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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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