1 Astrology
1.1 Origin
Canada, Russia
Kenya, Southern and central Africa
1.2 Color
Black, Green, Black, Green, Black, Green, gray, Black, Green, gray
Green, Brown, Yellow, Red
1.3 Streak
Not Available, Not Available, gray, Green
Not Available
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
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
Uneven, Brittle, Metallic, Brittle, Metallic
Gemstones (2009)
2.6 Cleavage
Perfect on [110]
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
NaNa2(Fe++4Fe+++)Si8O22(OH)2
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Strong: Blue-greens
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
3.3 Dispersion
3.4 Transparency
Not Available
Transparent
3.5 Refractive Index
1.652-1.6991.710-1.735
1
3.25
3.6 Optic Character
3.7 Crystal System
3.8 Birefringence
Not Available0.012-0.033
0
0.296
3.9 Clarity
Not Available
Transparent
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