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