1 Astrology
1.1 Origin
Kenya, Southern and central Africa
Canada, Russia
1.2 Color
Green, Brown, Yellow, Red
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
1.3 Streak
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Brown, White, Brown, 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
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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
Gemstones (2009)
Uneven, Brittle, Metallic
2.6 Cleavage
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Perfect on [001] imperfect on [100]
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
3.3 Dispersion
3.4 Transparency
3.5 Refractive Index
1.710-1.7351.678-1.758
1
3.25
3.6 Optic Character
3.7 Crystal System
3.8 Birefringence
3.9 Clarity
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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