1 Astrology
1.1 Origin
Southern and central Africa
Madagascar
1.2 Color
Brown, Brownish, White, Colorless, Yellow
Brownish, Black, Reddish, Brown, Blue
1.3 Streak
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
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
2.6 Cleavage
{011} Imperfect
{0001} good, {10 1 0} parting
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.
(Ca,Ce)(Al,Ti,Mg)12O19
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Weak: yellowish brown yellowAnthony et al
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
1.509-1.5411.79-1.807
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.030Not 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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