1 Astrology
1.1 Origin
Australia
Afghanistan, Southern and central Africa
1.2 Color
Brown, Brown, Reddish, Brownish, Yellow, Brown, Reddish, Brownish, Yellow
Blue, Greenish, Violet
1.3 Streak
Brown, Brownish, Yellow
Blue, White
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
2.2 Solubility
2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
2.6 Cleavage
Perfect {010}
Imperfect on {110}
2.7 Mohs Hardness
2.8 Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
3 Optical Properties
3.1 Luster
3.2 Pleochroism
VisibleArthur Thomas
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3.3 Dispersion
3.4 Transparency
Gemstones (2009)
Gemmological Tables (2004) More from other references
3.5 Refractive Index
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.138Not Available
0
0.296
3.9 Clarity
Gemstones (2009)
Gemmological Tables (2004) More from other references
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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