1 Astrology
1.1 Origin
Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania
Tanzania, Sri Lanka, China
1.2 Color
Blue, Violet, Greenish, Brown, Colorless, Colorless, Blue, Violet, Yellow, gray
Colorless
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
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1.7 How to Wear?
1.7.1 Finger
Not Available
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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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2.3 Durability
Not Available
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2.4 Specific Gravity
2.57-2.663.60-3.61
1
7.18
2.5 Fracture
Subconchoidal, Conchoidal, Brittle
Conchoidal
2.6 Cleavage
Fair on {100}, poor on {001} and {010}
Imperfect/fair/absent
2.7 Mohs Hardness
2.8 Chemical Composition
Mg2Al4Si5O18
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
Greasy, Vitreous
Vitreous
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
3.5 Refractive Index
Not Available1.70-1.73
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
Not Available0.055
0
0.296
3.9 Clarity
Not Available
Color grading system
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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