1 Astrology
1.1 Origin
Southern and central Africa
Kenya, Southern and central Africa
1.2 Color
Violet, Blue, Red, Yellow, Brown, gray
Green, Brown, Yellow, Red
1.3 Streak
White, None
Not Available
1.4 For which Rashi?
Not Available
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1.5 Planet
Not Available
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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
Not Available
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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
Not Available
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2.4 Specific Gravity
3.90-4.053.55-3.70
1
7.18
2.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Gemstones (2009)
2.6 Cleavage
None – parting in 3 directions
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
3 Optical Properties
3.1 Luster
Adamantine, Vitreous
Vitreous
3.2 Pleochroism
None
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Transparent
3.5 Refractive Index
1.758-1.7801.710-1.735
1
3.25
3.6 Optic Character
3.7 Crystal System
3.8 Birefringence
0.007-0.0100.012-0.033
0
0.296
3.9 Clarity
Gemmological Tables (2004) More from other references
Transparent
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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