Origin
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Canada, USA, Southern and central Africa
Color
Green, Brown, Colorless, Greenish, Yellow
Green
Specific Gravity
3.25-3.45
3.25-3.50
Fracture
Conchoidal, Uneven
Uneven
Cleavage
Good on {110}
Distinct
Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Ca 10Mg 2Al 4(SiO 4) 5(Si 2O 7) 2(OH) 4Ulrich Henn and Claudio C.
Pleochroism
X = colorless to green; Y = colorless
-
Transparency
-
Transparent
Refractive Index
1.660-1.685
1.700-1.725
Optic Character
-
Uniaxial/-
Crystal System
Orthorhombic
-
Birefringence
0.012-0.017
0.002-0.012
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Psychology
Harmony
Healing
Healing
Emotional healing
Emotional healing
Qualities Associated
Self-worth
Healing