Origin
Switzerland
Italy, Canada
Color
Brown, Brownish, Yellow, Black, Reddish
Blue, Red, Yellow, Colorless, Green, White
Streak
White, gray
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
3.7-3.82.90-3.10
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Conchoidal
Cleavage
Distinct on {010}
Poor/indistinct on {1120} and {1011}
Mohs Hardness
7-7.57
2
10
👆🏻
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Luster
Resinous
Vitreous
Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
Pale green
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
Transparent
Refractive Index
1.736-1.7621.614-1.666
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Trigonal
Birefringence
0.009-0.0150.014-0.032
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
Enhances mental clarity and focus
-
Cardiovascular
-
-
Respiratory
Good
-
Reproductive
-
-
Digestive
-
-
Psychology
Protection
Emotional healing
Healing
Physical healing
Emotional healing
Qualities Associated
Protection
Emotional Healing