1 Astrology
1.1 Origin
Colombia, Brazil, Madagascar
Australia
1.2 Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Blue, Green, Greenish, Black
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
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
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
Not Available
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2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
Not Available4.00-4.62
1
7.18
2.5 Fracture
Not Available
Conchoidal, Uneven
2.6 Cleavage
Not Available
Indistinct parting on [111]
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
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3.3 Dispersion
3.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
3.5 Refractive Index
Not Available1.790-1.818
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
Not AvailableNot Available
0
0.296
3.9 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda
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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