1 Astrology
1.1 Origin
Mexico
Canada, Madagascar, Southern and central Africa, Sri Lanka, USA
1.2 Color
Blue, Blue, Black
Violet, Blue
1.3 Streak
Grey, Black, gray
Not Available
1.4 For which Rashi?
Not Available
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1.5 Planet
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1.6 Element of Planets
Not Available
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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
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
2.6 Cleavage
Perfect on {0001}
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Marked
Strong trichroism: colorless to yellowish
3.3 Dispersion
3.4 Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Transparent
3.5 Refractive Index
1.45-2.621.542-1.578
1
3.25
3.6 Optic Character
3.7 Crystal System
3.8 Birefringence
Not Available0.008-0.012
0
0.296
3.9 Clarity
OpaqueAnthony et al
Transparent
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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