Origin
Tanzania, Sri Lanka, China
Southern and central Africa
Color
Colorless
Black, Brownish, Brown
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
3.60-3.614.5-4.8
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Imperfect/fair/absent
None, parting may develop along {111}
Mohs Hardness
8-8.55.5
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Fe++Cr2O4
Luster
Vitreous
-
Pleochroism
Weak
none.
Dispersion
0.020.04
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.70-1.732.08-2.16
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Hexagonal
Isometric
Birefringence
0.055-9999
0
0.296
👆🏻
Clarity
-
-
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Good
Poor
Reproductive
-
-
Digestive
-
-
Psychology
Transformation
Vitality
Healing
Physical healing
Emotional healing
Qualities Associated
Spiritual Growth
Protection