1 Astrology
1.1 Origin
Southern and central Africa
Australia, Brazil, Canada, Colombia, Madagascar, Zimbabwe
1.2 Color
Yellow, Brown, Black, Black
Brown
1.3 Streak
White
Brownish, Red, Black
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, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
{010} moderate, {100} imperfect
Good in one direction
2.7 Mohs Hardness
2.8 Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
Vitreous, Resinous
Resinous
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
3.5 Refractive Index
1.827-1.8792.190-2.457
1
3.25
3.6 Optic Character
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3.7 Crystal System
Orthorhombic
Orthorhombic
3.8 Birefringence
3.9 Clarity
TransparentAnthony et al
TransparentWalter Schumann
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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