Origin
Switzerland
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Color
Brown, Brownish, Yellow, Black, Reddish
Green, Brown, Colorless, Greenish, Yellow
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
3.7-3.83.25-3.45
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Conchoidal, Uneven
Cleavage
Distinct on {010}
Good on {110}
Mohs Hardness
7-7.56.5
2
10
👆🏻
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Resinous
Vitreous
Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
X = colorless to green; Y = colorless
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.736-1.7621.660-1.685
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Orthorhombic
Birefringence
0.009-0.0150.012-0.017
0
0.296
👆🏻
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
Enhances mental clarity and focus
-
Cardiovascular
-
-
Respiratory
Good
-
Reproductive
-
-
Digestive
-
-
Psychology
Protection
Harmony
Healing
Physical healing
Emotional healing
Qualities Associated
Protection
Self-worth