Origin
Switzerland
Southern and central Africa
Color
Brown, Brownish, Yellow, Black, Reddish
Black, Brownish, Brown
Streak
White, gray
Brown
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
3.7-3.84.5-4.8
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Distinct on {010}
None, parting may develop along {111}
Mohs Hardness
7-7.55.5
2
10
👆🏻
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Fe++Cr2O4
Luster
Resinous
-
Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
none.
Dispersion
0.020.04
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.736-1.7622.08-2.16
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Isometric
Birefringence
0.009-0.015-9999
0
0.296
👆🏻
Clarity
-
-
Physical
Neurological
Enhances mental clarity and focus
-
Cardiovascular
-
-
Respiratory
Good
Poor
Reproductive
-
-
Digestive
-
-
Psychology
Protection
Vitality
Healing
Physical healing
Emotional healing
Qualities Associated
Protection
Protection