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
Switzerland, Australia, Brazil
Green
Yellow, Colorless, White, Brownish, Reddish
Not Available
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Uneven
1,1 ; 3,2.
On {101}, distinct; on {112}, interrupted; on {001}, indistinct