1 Astrology
1.1 Origin
Sri Lanka, Southern and central Africa
Mexico, Thailand, Italy, Austria
1.2 Color
Blue
Green, Brown, Colorless, Greenish, gray, Yellow, White
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
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
2.3 Durability
Not Available
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2.4 Specific Gravity
3.95-4.103.30-3.50
1
7.18
2.5 Fracture
Not Available
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
2.6 Cleavage
Not Available
Perfect on {110}, poor on {101}, {001} rare
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Not Available
Vitreous, Adamantine, Silky
3.2 Pleochroism
Not Available
AbsentWalter Schumann
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Transparent, Translucent
3.5 Refractive Index
1.757-1.7801.614-1.636
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
Not Available
Orthorhombic
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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