1 Astrology
1.2 Origin
India
Southern and central Africa
1.4 Color
Blue, Greenish, Greenish, Blue
White, Colorless, gray, Yellow
1.6 Streak
1.8 For which Rashi?
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1.9 Planet
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1.11 Element of Planets
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1.13 How to Wear?
1.13.1 Finger
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1.14.1 Ring Metal
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1.16 Energy
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1.18 Deities
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1.19 Not to wear with
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1.20 Powers
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1.21 Birthstone
1.21.1 Planetary
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2.1.1 Talisman
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3 Physical Properties
3.2 Tenacity
3.4 Solubility
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3.5 Durability
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3.6 Specific Gravity
2.25-2.332.45-2.50
1
7.18
3.8 Fracture
Brittle, Metallic, Brittle, Metallic
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
3.10 Cleavage
Good on {010}
Poor on {110}
3.12 Mohs Hardness
3.14 Chemical Composition
Ca(VO)Si4O10•4(H2O)
KAlSi 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
5 Optical Properties
5.1 Luster
Vitreous, Pearly
Vitreous
5.3 Pleochroism
Visible: X=Z= colorless Y= blue
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5.5 Dispersion
5.7 Transparency
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Gemmological Tables (2004) More from other references
5.8 Refractive Index
5.10 Optic Character
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5.12 Crystal System
5.14 Birefringence
5.16 Clarity
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TransparentUlrich Henn and Claudio C. Milisenda
6 Benefits
6.1 Physical
6.1.1 Neurological
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7.1.1 Cardiovascular
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7.1.3 Respiratory
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7.1.5 Reproductive
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7.1.7 Digestive
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7.2 Psychology
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7.3 Healing
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7.5 Qualities Associated
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