Origin
Southern and central Africa
Sri Lanka
Color
Black, Brownish, Brown
Green, Red, Blue, Brown, 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
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.5-4.83.02
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
None, parting may develop along {111}
{0001} Poor
Mohs Hardness
5.5-9999
2
10
👆🏻
Chemical Composition
Fe++Cr2O4
Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Luster
-
Vitreous
Pleochroism
none.
Strong: dark brown light brownAnthony et al
Dispersion
0.040.01
0.005
1
👆🏻
Transparency
-
Transparent
Refractive Index
2.08-2.16-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
-
Birefringence
-9999-9999
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Poor
Excellent
Reproductive
-
-
Digestive
-
Supports digestive health
Psychology
Vitality
-
Healing
Emotional healing
Emotional healing
Qualities Associated
Protection
Creativity