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
Russia, green, violet, Yellow, blue, green, violet, Yellow, blue
Green
Black, Violet, Blue, Green
Scorpio
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
Not Available
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Transparent, Transparent to nearly opaque
Gems, Sixth Edition (2006)