Chrysoberyl
(kris'-o-ber-il')
1790; lat. chysoberyllus, gr. khrysoberyllos, sansk. vaidurya
Very hard transparent yellow-green mineral used as a gemstone
Color
Yellow to greenish yellow
Chemical composition
BeAl2O4
Crystal system
Orthorhombic
Hardness (Mohs scale)
8,5
Specific gravity
3,73 ±0,03
Refractive index
1,746 - 1,755 ±0,0O5
Optical character
Biaxial +