1 Astrology
1.1 Origin
Sri Lanka, India, Brazil
Madagascar
1.2 Color
Green, Brown, Brown, Colorless, Green, gray, Yellow
Brownish, Black, Reddish, Brown, Blue
1.3 Streak
Brownish, White, Brownish, White
Reddish, Brown
1.4 For which Rashi?
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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
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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
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
2.6 Cleavage
none
{0001} good, {10 1 0} parting
2.7 Mohs Hardness
2.8 Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
(Ca,Ce)(Al,Ti,Mg)12O19
3 Optical Properties
3.1 Luster
Greasy, Vitreous
Vitreous
3.2 Pleochroism
None
O = brownish gray; E = gray
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Handbook of mineralogy (2001)
3.5 Refractive Index
1.730-1.7601.79-1.807
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.020Not Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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