Origin
Southern and central Africa
China, Canada
Color
Colorless, Green, Yellow, White
Green, Yellow, Brown, White, gray, Black
Specific Gravity
3.23-3.26
2.90-3.10
Fracture
Conchoidal
Splintery, Granular
Cleavage
Perfect on {010} imperfect on {100}
None
Mohs Hardness
6.5-7
6-6.5
Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous
Vitreous, Greasy
Pleochroism
colorless.
None
Transparency
Transparent
Translucent
Refractive Index
1.635-1.671
1.600-1.627
Crystal System
Orthorhombic
monoclinic
Birefringence
0.033-0.042
0.027
Clarity
Transparent
Translucent
Neurological
-
Aids in mental clarity and focus
Reproductive
Supports healthy digestion
-
Psychology
Peace
Emotional Balance
Healing
Physical healing
Physical healing
Qualities Associated
Peace
Healing