Origin
Southern and central Africa
Southern and central Africa
Color
Black, Brownish, Brown
Yellow, Blue, Black, Green, gray
Streak
Brown
White
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.5-4.83.43-3.44
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
None, parting may develop along {111}
None Observed
Mohs Hardness
5.56.5-7
2
10
👆🏻
Chemical Composition
Fe++Cr2O4
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
-
Vitreous
Pleochroism
none.
visible
Dispersion
0.040.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
2.08-2.161.696-1.702
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
Triclinic
Birefringence
-99990.005
0
0.296
👆🏻
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Poor
-
Reproductive
-
-
Digestive
-
-
Psychology
Vitality
-
Healing
Emotional healing
Emotional healing
Qualities Associated
Protection
Transformation