Origin
Southern and central Africa
Southern and central Africa
Color
Grey, Green
Blue, Colorless, White
Streak
Not Available
White
For which Rashi?
Not Available
Gemini, Virgo
Planet
Not Available
Moon
Element of Planets
Not Available
Earth
Energy
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Quan Yin
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.62-3.68
2.45-2.58
Fracture
Conchoidal
UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Not Available
None
Mohs Hardness
8-8.5
3-3.5
Chemical Composition
(Mg,Fe,Zn)Al 6BeO 12Ulrich Henn and Claudio C.
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pleochroism
Not Available
NilArthur Thomas
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004)
Gemmological Tables (2004) More from other references
Refractive Index
1.719-1.739
1.583-1.608
Optic Character
Not Available
Not Available
Crystal System
Trigonal
monoclinic
Birefringence
0.014-0.016
0.019
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Gemmological Tables (2004) More from other references
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available