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
Not Available
Green
Black, Green, Brown, Red, Greenish, Yellow, Brown, Green, Yellow, orange
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Yellow, Green, Greenish, Yellow
Not Available
Brittle, Metallic, Brittle, Metallic