1 Astrology
1.1 Origin
Southern and central Africa, USA, Australia, Brazil, USA, Australia, Brazil, USA
Mexico
1.2 Color
1.3 Streak
Not Available
Grey, Black, gray
1.4 For which Rashi?
Cancer, Taurus, Cancer, Taurus, Cancer, Taurus
Not Available
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
Not Available
1.8 Energy
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Protection, Healing
Not Available
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
2.2 Solubility
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
2.5 Fracture
Gems, Sixth Edition (2006)
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
2.6 Cleavage
2.7 Mohs Hardness
2.8 Chemical Composition
SiO2 (with a high level of nickel impurities )
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
3 Optical Properties
3.1 Luster
Vitreous, Vitreous, Waxy
Resinous
3.2 Pleochroism
AbsentWalter Schumann
Marked
3.3 Dispersion
3.4 Transparency
Translucent, Translucent, Opaque, Translucent to nearly opaque
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
3.5 Refractive Index
1.530-1.5431.45-2.62
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.004Not Available
0
0.296
3.9 Clarity
Translucent
OpaqueAnthony et al
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
Not Available
4.1.3 Respiratory
Not Available
Not Available
4.1.4 Reproductive
Not Available
Not Available
4.1.5 Digestive
Not Available
Not Available
4.2 Psychology
Not Available
Not Available
4.3 Healing
Not Available
Not Available
4.4 Qualities Associated
Not Available
Not Available