Astrology
Origin
Australia
Pakistan, Italy, Russia, China, Brazil, Switzerland, Madagascar, Austria, Canada
Color
Blue, Green, Greenish, Black
Reddish, Brown, Yellow, Green, Red, gray
Streak
Grey, gray
Reddish, White
For which Rashi?
Not Available
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Planet
Not Available
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Element of Planets
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Energy
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How to Wear?
Finger
Not Available
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Ring Metal
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Deities
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Not to wear with
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Powers
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Birthstone
Planetary
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Talisman
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Physical Properties
Tenacity
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Solubility
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Durability
Not Available
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Specific Gravity
4.00-4.62
3.48-3.60
Fracture
Conchoidal, Uneven
Sub-Conchoidal, Conchoidal, Brittle
Cleavage
Indistinct parting on [111]
Distinct on [110], parting on {221}
Mohs Hardness
7.5-8
5-5.5
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Not Available
Optical Properties
Luster
Vitreous
Subadamantine, Resinous
Pleochroism
Not Available
Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange
Dispersion
Not Available
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Transparency
Gemmological Tables (2004) More from other references
Not Available
Refractive Index
1.790-1.818
1.885-1.990
Optic Character
Not Available
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Crystal System
cubic
monoclinic
Birefringence
Not Available
0.105-0.135
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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Benefits
Physical
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
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Qualities Associated
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