Origin
Southern and central Africa
Brazil
Color
Black, Brownish, Brown
Green, Colorless, Greenish, Yellow
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
4.5-4.82.98-2.99
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
None, parting may develop along {111}
(010) Distinct to good
Mohs Hardness
5.55.5
2
10
👆🏻
Chemical Composition
Fe++Cr2O4
NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
-
Vitreous
Pleochroism
none.
Very weakWalter Schumann
Dispersion
0.040.01
0.005
1
👆🏻
Transparency
-
-
Refractive Index
2.08-2.161.602-1.625
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
monoclinic
Birefringence
-99990.019-0.021
0
0.296
👆🏻
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Poor
Good
Reproductive
-
-
Digestive
-
-
Psychology
Vitality
Empowerment
Healing
Emotional healing
Emotional healing
Qualities Associated
Protection
Manifestation