Origin
India, Italy
Southern and central Africa
Color
White, Reddish
Greenish, Blue, Colorless, Green, Yellow
Streak
White
Greenish, gray
Specific Gravity
2.08-2.16
3.17-3.24
Fracture
Irregular/uneven
Conchoidal
Cleavage
distinct/good on {1011}
(0001) indistinct
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
SiCArthur Thomas , Gemstones (2009)
Luster
Vitreous
Adamantine
Transparency
Transparent
-
Refractive Index
1.478-1.490
2.648-2.691
Crystal System
Trigonal
6H polytype
Birefringence
0.005-0.008
0.043
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Cardiovascular
Supports heart health
-
Psychology
Emotional Healing
Clarity
Healing
Emotional healing
-
Qualities Associated
Optimism
Creativity