1 Astrology
1.1 Origin
Not Available
Southern and central Africa
1.2 Color
Black, White
Greenish, Blue, Colorless, Green, Yellow
1.3 Streak
Not Available
Greenish, gray
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
Not Available
1.6 Element of Planets
Not Available
Not Available
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
Not Available
Not Available
1.9 Deities
Not Available
Not Available
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
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1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
Not Available3.17-3.24
1
7.18
1.5 Fracture
Not Available
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
1.6 Cleavage
Not Available
(0001) indistinct
1.7 Mohs Hardness
1.11 Chemical Composition
Not Available
SiCArthur Thomas , Gemstones (2009)
2 Optical Properties
2.1 Luster
2.2 Pleochroism
Not Available
NilArthur Thomas
2.3 Dispersion
2.5 Transparency
Not Available
Gemmological Tables (2004) More from other references
2.6 Refractive Index
Not Available2.648-2.691
1
3.25
2.7 Optic Character
Not Available
Not Available
2.8 Crystal System
Not Available
6H polytype
2.9 Birefringence
Not Available0.043
0
0.296
2.10 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda
3 Benefits
3.1 Physical
3.1.1 Neurological
Not Available
Not Available
3.1.2 Cardiovascular
Not Available
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3.1.3 Respiratory
Not Available
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3.1.4 Reproductive
Not Available
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3.1.5 Digestive
Not Available
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3.2 Psychology
Not Available
Not Available
3.3 Healing
Not Available
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3.4 Qualities Associated
Not Available
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