Origin
India, Southern and central Africa, Madagascar
Brazil
Color
Black, Brownish, Greenish
White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
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
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.18-3.222.65-2.90
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
-
Cleavage
{1011} Indistinct
{001} Perfect
Mohs Hardness
-9999-9999
2
10
👆🏻
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Pearly
Pleochroism
Very strong: yellow-brown pale yellow
-
Dispersion
0.020.05
0.005
1
👆🏻
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.635-1.6721.534-1.601
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
-
Birefringence
0.0250.050
0
0.296
👆🏻
Clarity
Transparent
Translucent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Good
-
Reproductive
-
-
Digestive
-
-
Psychology
Protection
-
Healing
Emotional healing
-
Qualities Associated
Protection & Grounding
Emotional Healing