Origin
-
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Color
Colorless, Yellow, Red, Green, Violet, Greenish, gray
Green, Brown, Colorless, Greenish, Yellow
Solubility
Slowly dissolves in water
-
Specific Gravity
-9999
3.25-3.45
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
None
Good on {110}
Chemical Composition
K2Mg2(SO4)3
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Pleochroism
-
X = colorless to green; Y = colorless
Refractive Index
1.5329-1.5347
1.660-1.685
Crystal System
cubic
Orthorhombic
Birefringence
-9999
0.012-0.017
Clarity
-
TransparentUlrich Henn and Claudio C. Milisenda
Healing
-
Emotional healing
Qualities Associated
-
Self-worth