Origin
-
Southern and central Africa, Burma, Tanzania, India, Sri Lanka
Color
Brownish, Black
Yellow, White, Green, Brown, Greenish, gray
Streak
Brown
Grey, gray
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
3.263.20-3.25
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
None
Good/distinct on [210]
Mohs Hardness
-99995.5
2
10
👆🏻
Chemical Composition
NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Resinous
Vitreous, Pearly
Pleochroism
Strong: yellow-brown
Pale green to pale orange
Dispersion
0.020.01
0.005
1
👆🏻
Transparency
Translucent
Transparent, Translucent
Refractive Index
-99991.650-1.680
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
Orthorhombic
Birefringence
-99990.009-0.011
0
0.296
👆🏻
Clarity
Translucent
Transparent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
-
-
Reproductive
-
-
Digestive
-
-
Psychology
-
Grounding
Healing
-
Emotional healing
Qualities Associated
Protection
Grounding