Origin
Brazil, Colombia, Southern and central Africa
Southern and central Africa
Color
Greenish, Blue, Colorless, White, Green
Green, Brown
Specific Gravity
3.08-3.12
2.39-4.00
Fracture
ConchoidalWalter Schumann
-
Cleavage
{010} Perfect
None
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2
Pleochroism
Weak: colorless-(greenish) yellow
-
Transparency
-
Transparent, Translucent
Refractive Index
1.650-1.677
1.48-1.70
Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
-
Birefringence
0.019-0.025
-9999
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Neurological
Enhances mental clarity and focus
-
Reproductive
-
Supports healthy digestion
Digestive
-
Aids in digestion and nutrient absorption
Healing
Emotional healing
-
Qualities Associated
Communication
Transformation