1 Astrology
1.1 Origin
Canada
Southern and central Africa
1.3 Color
Brown, Reddish, Black, Brownish
Blue
3.2 Streak
3.4 For which Rashi?
Not Available
Not Available
3.7 Planet
Not Available
Not Available
3.9 Element of Planets
Not Available
Not Available
3.11 Energy
Not Available
Not Available
3.14 How to Wear?
3.14.1 Finger
Not Available
Not Available
3.14.2 Ring Metal
Not Available
Not Available
3.15 Deities
Not Available
Not Available
3.16 Not to wear with
Not Available
Not Available
3.17 Powers
Not Available
Not Available
3.18 Birthstone
3.18.1 Planetary
Not Available
Not Available
3.18.2 Talisman
Not Available
Not Available
4 Physical Properties
4.1 Tenacity
Not Available
Not Available
4.2 Solubility
Not Available
Not Available
4.3 Durability
Not Available
Not Available
4.4 Specific Gravity
3.77-3.932.64-2.69
1
7.18
4.14 Fracture
Gems, Conchoidal, Brittle
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
4.15 Cleavage
4.16 Mohs Hardness
7.5 Chemical Composition
Ca 3Ti4+2(Fe3+2Si)O 12Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
8 Optical Properties
8.1 Luster
8.2 Pleochroism
Not Available
Not Available
8.3 Dispersion
8.10 Transparency
Translucent
Transparent, Translucent
8.11 Refractive Index
1.94-1.981.544-1.553
1
3.25
8.21 Optic Character
Not Available
Not Available
8.22 Crystal System
Not Available
Not Available
8.23 Birefringence
Not Available0.009
0
0.296
11.5 Clarity
12 Benefits
12.1 Physical
12.2.1 Neurological
Not Available
Not Available
12.3.1 Cardiovascular
Not Available
Not Available
12.3.2 Respiratory
Not Available
Not Available
12.3.3 Reproductive
Not Available
Not Available
12.3.4 Digestive
Not Available
Not Available
12.4 Psychology
Not Available
Not Available
12.5 Healing
Not Available
Not Available
12.6 Qualities Associated
Not Available
Not Available