Astrology
Origin
Southern and central Africa
Brazil
Color
Yellow, Brown, Black, Black
Blue
Streak
White
Not Available
For which Rashi?
Not Available
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Planet
Not Available
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Element of Planets
Not Available
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Energy
Not Available
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How to Wear?
Finger
Not Available
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Ring Metal
Not Available
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Deities
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Not to wear with
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Powers
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Birthstone
Planetary
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Talisman
Not Available
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Physical Properties
Tenacity
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
4.392
2.60-2.90
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
{010} moderate, {100} imperfect
Not Available
Mohs Hardness
6.5-7
7.5-8
Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Be 3Al 2Si 6O 18Ulrich Henn and Claudio C.
Optical Properties
Luster
Vitreous, Resinous
Not Available
Pleochroism
Faint
Strong dichroism: blue to colourless\
Dispersion
Not Available
Not Available
Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Transparent
Refractive Index
1.827-1.879
1.560-1.604
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Not Available
Birefringence
0.042-0.051
0.003-0.010
Clarity
TransparentAnthony et al
Transparent
Benefits
Physical
Neurological
Not Available
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
Not Available
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Healing
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Qualities Associated
Not Available
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