1 Astrology
1.1 Origin
Southern and central Africa
Brazil, Southern and central Africa, Sri Lanka
1.2 Color
Black, Blue, Violet
Red, gray
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
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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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Insoluble in acids
2.3 Durability
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2.4 Specific Gravity
2.95-3.134.20-4.30
1
7.18
2.5 Fracture
Not Available
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
{210} Perfect
{110} good, 100 moderate, parting on {092} and {011}
2.7 Mohs Hardness
2.9 Chemical Composition
Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.3 Pleochroism
Strong in shades of violet when dark-colored.Anthony et al
Weak to distinct brownish red-green-yellow
3.4 Dispersion
4.4 Transparency
Transparent
Transparent, Translucent
4.5 Refractive Index
1.622-1.6662.609-2.903
1
3.25
4.6 Optic Character
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4.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
tetragonal
4.8 Birefringence
Not Available0.296
0
0.296
4.12 Clarity
5 Benefits
5.1 Physical
5.1.1 Neurological
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5.2.1 Cardiovascular
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5.2.2 Respiratory
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5.2.3 Reproductive
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5.2.4 Digestive
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5.3 Psychology
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5.4 Healing
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5.5 Qualities Associated
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