1 Astrology
1.1 Origin
1.2 Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Colorless, Colorless, Yellow, Green, White, Blue
1.3 Streak
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1.4 For which Rashi?
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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
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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
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
1.98-2.502.70-2.75
1
7.18
2.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
Not Available
From the Greek for luster, for its pearly luster on the cleavage.
2.7 Mohs Hardness
2.8 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
AbsentWalter Schumann
NilArthur Thomas
3.3 Dispersion
3.4 Transparency
Translucent
Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.37-1.521.570-1.591
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
Not Available0.020-0.021
0
0.296
3.9 Clarity
Translucent
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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