1 Astrology
1.1 Origin
Kenya, Southern and central Africa
India
1.2 Color
Green, Brown, Yellow, Red
Colorless, White, gray, Brownish, Greenish
1.3 Streak
1.4 For which Rashi?
Not Available
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1.5 Planet
Not Available
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1.6 Element of Planets
Not Available
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1.7 How to Wear?
1.7.1 Finger
Not Available
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1.7.2 Ring Metal
Not Available
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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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2.3 Durability
Not Available
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2.4 Specific Gravity
3.55-3.702.78-2.88
1
7.18
2.5 Fracture
Gemstones (2009)
Micaceous, Brittle
2.6 Cleavage
Not Available
Perfect on the {001}
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Silky, Pearly
3.2 Pleochroism
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
Weak
3.3 Dispersion
3.4 Transparency
3.5 Refractive Index
1.710-1.7351.552-1.618
1
3.25
3.6 Optic Character
3.7 Crystal System
3.8 Birefringence
0.012-0.033Not Available
0
0.296
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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