1 Astrology
1.1 Origin
Southern and central Africa
Kenya, Southern and central Africa
1.2 Color
Red, Blue, Green, Reddish, Brown
Green, Brown, Yellow, Red
1.3 Streak
1.4 For which Rashi?
Not Available
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
Not Available
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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
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
3.79-3.943.55-3.70
1
7.18
2.5 Fracture
Lamellar, Splintery
Gemstones (2009)
2.6 Cleavage
{100} Good, {001} Good, {010} Poor
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
3.3 Dispersion
3.4 Transparency
TranslucentAnthony et al, Handbook of mineralogy (2001)
Transparent
3.5 Refractive Index
1.670-1.7341.710-1.735
1
3.25
3.6 Optic Character
3.7 Crystal System
Not Available
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3.8 Birefringence
Not Available0.012-0.033
0
0.296
3.9 Clarity
TranslucentAnthony et al
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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