1 Astrology
1.1 Origin
Southern and central Africa, violet, blue, violet, blue
Canada, Mexico, Brazil, Tanzania, Madagascar, Sri Lanka
1.2 Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
Yellow, Red, Brown, yellowish orange
1.3 Streak
1.4 For which Rashi?
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
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1.5 Planet
1.6 Element of Planets
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
1.9 Deities
1.10 Not to wear with
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1.11 Powers
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
3.26-3.41Not Available
1
7.18
2.5 Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
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2.6 Cleavage
Distinct on {100}, poor on {110}; parting on {001}
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2.7 Mohs Hardness
2.8 Chemical Composition
AlAl6O3BSi3O18
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3 Optical Properties
3.1 Luster
3.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
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3.3 Dispersion
3.4 Transparency
Translucent, Translucent to opaque
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3.5 Refractive Index
1.669-1.7231.72-1.75
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.011-0.037Not Available
0
0.296
3.9 Clarity
Translucent
Color grading system
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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