1 Astrology
1.1 Origin
Kenya, Southern and central Africa
Madagascar
1.2 Color
Colorless, Greenish, Blue
Brownish, Black, Reddish, Brown, Blue
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
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
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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
2.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
2.6 Cleavage
{010} Perfect
{0001} good, {10 1 0} parting
2.7 Mohs Hardness
2.8 Chemical Composition
(Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Ce)(Al,Ti,Mg)12O19
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
O = brownish gray; E = gray
3.3 Dispersion
3.4 Transparency
Transparent
Handbook of mineralogy (2001)
3.5 Refractive Index
1.701-1.7241.79-1.807
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
0.005-0.007Not Available
0
0.296
3.9 Clarity
Transparent
Handbook of mineralogy (2001)
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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