1 Astrology
1.1 Origin
Southern and central Africa, violet, blue, violet, blue
Brazil
1.2 Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
Yellow, pink
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
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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
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
3.26-3.413.05-3.08
1
7.18
2.5 Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Subconchoidal, Uneven, Conchoidal, Uneven
2.6 Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Poor on {100}
2.7 Mohs Hardness
2.8 Chemical Composition
AlAl6O3BSi3O18
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Resinous
3.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Visible: X = yellow; Y = pink; Z = pale pink to colorless
3.3 Dispersion
3.4 Transparency
Translucent, Translucent to opaque
Transparent
3.5 Refractive Index
1.669-1.7231.639-1.672
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Orthorhombic
Orthorhombic
3.8 Birefringence
0.011-0.0370.029-0.032
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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