Origin
Italy, China
India, Southern and central Africa, Madagascar
Color
Colorless, White, Blue, gray
Black, Brownish, Greenish
Streak
White
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
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.093.18-3.22
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
Perfect on {100} and {010}, imperfect on {101}
{1011} Indistinct
Mohs Hardness
8-9999
2
10
👆🏻
Chemical Composition
CaAl2Si2O7(OH)2.H2O
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Luster
Vitreous, Greasy
Vitreous
Pleochroism
Weak
Very strong: yellow-brown pale yellow
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
-
Transparent, Translucent
Refractive Index
1.672-1.6761.635-1.672
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
-
Birefringence
0.019-0.0210.025
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Good
Good
Reproductive
-
-
Digestive
-
-
Psychology
-
Protection
Healing
Emotional healing
Emotional healing
Qualities Associated
-
Protection & Grounding