Italy, India, USA, Canada
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
White, Colorless, Green, Yellow, Brown, Brown, Colorless, Yellow, White, Green
Green
Brittle, Uneven, Brittle, Uneven
Not Available