Origin
Southern and central Africa
Canada, Southern and central Africa
Color
Black, Brownish, Brown
Violet, Colorless, pink
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
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.5-4.82.51-2.53
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Splintery
Cleavage
None, parting may develop along {111}
None
Mohs Hardness
5.55
2
10
👆🏻
Chemical Composition
Fe++Cr2O4
KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
-
Vitreous
Pleochroism
none.
Colorless
Dispersion
0.040.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
2.08-2.161.511-1.532
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
Hexagonal
Birefringence
-99990.021
0
0.296
👆🏻
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Poor
Good
Reproductive
-
-
Digestive
-
-
Psychology
Vitality
-
Healing
Emotional healing
-
Qualities Associated
Protection
Love