1 Astrology
1.3 Origin
Southern and central Africa
Canada, Southern and central Africa, Italy, Australia, India
1.4 Color
Blue
Violet, Brownish, Yellow, Reddish, Pale pink
1.5 Streak
1.6 For which Rashi?
1.7 Planet
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Mercury, Jupiter
1.2 Element of Planets
1.4 Energy
1.5 How to Wear?
1.5.1 Finger
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1.6.1 Ring Metal
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1.8 Deities
1.10 Not to wear with
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1.12 Powers
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1.14 Birthstone
1.14.1 Planetary
1.15.3 Talisman
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2 Physical Properties
2.1 Tenacity
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2.3 Solubility
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2.5 Durability
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2.6 Specific Gravity
3.11 Fracture
Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
3.12 Cleavage
Imperfect in one direction
Poor on {0001}
3.13 Mohs Hardness
5.6 Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
6 Optical Properties
6.1 Luster
6.2 Pleochroism
6.3 Dispersion
7.8 Transparency
7.9 Refractive Index
1.607-1.6721.607-1.612
1
3.25
7.18 Optic Character
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7.19 Crystal System
7.20 Birefringence
10.4 Clarity
11 Benefits
11.1 Physical
11.1.1 Neurological
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11.1.2 Cardiovascular
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11.1.3 Respiratory
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11.1.4 Reproductive
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11.1.5 Digestive
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11.2 Psychology
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11.3 Healing
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11.4 Qualities Associated
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