Origin
Southern and central Africa
Southern and central Africa
Color
Green
Greenish, Blue, Colorless, Green, Yellow
Specific Gravity
2.60-3.02
3.17-3.24
Cleavage
Perfect
(0001) indistinct
Mohs Hardness
-9999
9-9.5
Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
SiCArthur Thomas , Gemstones (2009)
Luster
Pearly, Greasy
Adamantine
Transparency
Transparent
-
Refractive Index
1.571-1.597
2.648-2.691
Optic Character
Biaxial/+
-
Crystal System
-
6H polytype
Birefringence
-9999
0.043
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
Enhances mental clarity and focus
-
Psychology
Spiritual Enlightenment
Clarity
Healing
Emotional healing
-
Qualities Associated
Spiritual Enlightenment
Creativity