1 Astrology
1.1 Origin
Canada, Russia
Canada, Southern and central Africa, Italy, Australia, India
1.2 Color
Black, Green, Black, Green, Black, Green, gray, Black, Green, gray
Violet, Brownish, Yellow, Reddish, Pale pink
1.3 Streak
Not Available, Not Available, gray, Green
White
1.4 For which Rashi?
1.5 Planet
Not Available
Mercury, Jupiter
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
Not Available
Not Available
1.12 Birthstone
1.12.1 Planetary
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
Uneven, Brittle, Metallic, Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
Perfect on [110]
Poor on {0001}
2.7 Mohs Hardness
2.8 Chemical Composition
NaNa2(Fe++4Fe+++)Si8O22(OH)2
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Not Available
Translucent
3.5 Refractive Index
1.652-1.6991.607-1.612
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
Not Available0.003
0
0.296
3.9 Clarity
Not Available
Translucent
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