Origin
Southern and central Africa
Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia
Color
Greenish, Blue, Colorless, Green, Yellow
Blue, Violet, Colorless, Red, Green, Brown
Streak
Greenish, gray
White
For which Rashi?
-
Sagittarius, Scorpio
Specific Gravity
3.17-3.24
3.64-3.66
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
(0001) indistinct
None, but may exhibit slight parting
Chemical Composition
SiCArthur Thomas , Gemstones (2009)
MgAl2O4
Luster
Adamantine
Vitreous
Transparency
-
Transparent, Translucent, Transparent to translucent
Refractive Index
2.648-2.691
1.73
Crystal System
6H polytype
Isometric
Birefringence
0.043
-9999
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda
Psychology
Clarity
Revitalization
Healing
-
Emotional healing
Qualities Associated
Creativity
Vitality