Origin
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Switzerland
Color
Green, Brown, Colorless, Greenish, Yellow
Brown, Brownish, Yellow, Black, Reddish
Streak
White
White, 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
3.25-3.453.7-3.8
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Conchoidal
Cleavage
Good on {110}
Distinct on {010}
Mohs Hardness
6.57-7.5
2
10
👆🏻
Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Luster
Vitreous
Resinous
Pleochroism
X = colorless to green; Y = colorless
X = colorless; Y = pale yellow; Z = golden yellow
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.660-1.6851.736-1.762
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
monoclinic
Birefringence
0.012-0.0170.009-0.015
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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Physical
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
-
Respiratory
-
Good
Reproductive
-
-
Digestive
-
-
Psychology
Harmony
Protection
Healing
Emotional healing
Physical healing
Qualities Associated
Self-worth
Protection