1 Astrology
1.1 Origin
Madagascar
Southern and central Africa, Burma, Tanzania, India, Sri Lanka
1.2 Color
Brownish, Black, Reddish, Brown, Blue
Yellow, White, Green, Brown, Greenish, gray
1.3 Streak
Reddish, Brown
Grey, gray
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
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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
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
2.6 Cleavage
{0001} good, {10 1 0} parting
Good/distinct on [210]
2.7 Mohs Hardness
2.8 Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Pearly
3.2 Pleochroism
O = brownish gray; E = gray
Pale green to pale orange
3.3 Dispersion
3.4 Transparency
Handbook of mineralogy (2001)
Transparent, Translucent
3.5 Refractive Index
1.79-1.8071.650-1.680
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
Not Available0.009-0.011
0
0.296
3.9 Clarity
Handbook of mineralogy (2001)
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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