Russia, Madagascar, Brazil
Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light), Hardness: 8, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O4, Crystal structure: orthorhombic, Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma
Green, Green, White, Blue
Green
Uneven, Uneven, Gems, Sixth Edition (2006)
Not Available
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
1,1 ; 3,2.
Translucent, Translucent to opaque
Transparent, Transparent to nearly opaque