1 Astrology
1.1 Origin
India, Southern and central Africa, Madagascar
Canada, Pakistan
1.2 Color
Black, Brownish, Greenish
Reddish, Greenish, White, Red, Yellow, Green, Grey, Blue, Brown, Colorless, White, gray, Reddish, orange
1.3 Streak
1.4 For which Rashi?
Not Available
Virgo, Capricorn, Virgo, Capricorn, Virgo, Capricorn
1.5 Planet
1.6 Element of Planets
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
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1.8 Energy
Not Available
Projective, Receptive
1.9 Deities
1.10 Not to wear with
Not Available
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1.11 Powers
1.12 Birthstone
1.12.1 Planetary
Not Available
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1.12.2 Talisman
Not Available
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2 Physical Properties
2.1 Tenacity
2.2 Solubility
Not Available
Dilute acid
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.18-3.222.93-2.96
1
7.18
2.5 Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
2.6 Cleavage
{1011} Indistinct
Distinct on {010}, imperfect {110} and {011}
2.7 Mohs Hardness
2.8 Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Resinous
3.2 Pleochroism
Very strong: yellow-brown pale yellow
StrongArthur Thomas
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Transparent, Translucent
3.5 Refractive Index
1.635-1.6721.525-1.686
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Not Available
Orthorhombic
3.8 Birefringence
3.9 Clarity
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
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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
Not Available
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