1 Astrology
1.1 Origin
Southern and central Africa, violet, blue, violet, blue
Guatemala, Russia, Columbia, Canada, Italy
1.2 Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
White, Red, Brown, Green, gray
1.3 Streak
1.4 For which Rashi?
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
Not Available
1.5 Planet
1.6 Element of Planets
1.7 How to Wear?
1.7.1 Finger
Not Available
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1.7.2 Ring Metal
Not Available
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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
3.26-3.413.28-3.38
1
7.18
2.5 Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Splintery, UnevenArthur Thomas, Difficult, Fibrous
2.6 Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Good on [110]
2.7 Mohs Hardness
2.8 Chemical Composition
AlAl6O3BSi3O18
NaAlSi 2O 6Ulrich Henn and Claudio C.
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
NilArthur Thomas
3.3 Dispersion
3.4 Transparency
Translucent, Translucent to opaque
Translucent
3.5 Refractive Index
1.669-1.7231.652-1.688
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
0.011-0.0370.013-0.020
0
0.296
3.9 Clarity
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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