Brazil, Color: bi-color, violet / yellow, Hardness: 7, Refractive index: 1.54 1.55, Density: 2.65 2.66, Chemical composition: SiO2, Crystal structure: hexagonal, Lustre: vitreous, Origins: Brazil, Bolivia, Uruguay. Ametrine is a bi-color variety of quartz, Yellow, Orange, India
Brazil, Madagascar, Zimbabwe, Russia, Sri Lanka, India, Burma, Color: blue, Not Available, Hardness: 8.5, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O3, Crystal structure: orthorhombic, Origins: Brazil, Burma. Bluish stones are most valuable. Prices for chrysoberyls grow rapidly with weight, and clean stones bigger than 15 cts are rare and therefore an excellent investment.
Yellow
Greenish, Green, Brownish, Red, Blue, Brown, gray
Not Available
Uneven, Conchoidal to uneven, Brittle, Metallic, ConchoidalWalter Schumann