1 Astrology
1.1 Origin
Not Available
Southern and central Africa
1.2 Color
Not Available
Violet, Blue, Red, Yellow, Brown, gray
1.3 Streak
Not Available
White, None
1.4 For which Rashi?
Not Available
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1.5 Planet
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Not Available
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
2.2 Solubility
2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
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Uneven, Uneven, Gems, Difficult, Fibrous
2.6 Cleavage
Not Available
None – parting in 3 directions
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
Al 2O 3Arthur Thomas , Gemstones (2009)
3 Optical Properties
3.1 Luster
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Adamantine, Vitreous
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Not Available
Transparent, Translucent
3.5 Refractive Index
1.610-1.8301.758-1.780
1
3.25
3.6 Optic Character
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Not Available
3.7 Crystal System
3.8 Birefringence
Not Available0.007-0.010
0
0.296
3.9 Clarity
Not Available
Gemmological Tables (2004) More from other references
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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