USA, Zambia, Madagascar, India, Sri Lanka, Russia, Australia, Color: violet, purple-violet, Hardness: 7, Refractive index: 1.54 1.55, Density: 2.65 2.66, Chemical composition: SiO2, Crystal structure: hexagonal, Lustre: vitreous, Origins: Widespread; main sources are Brazil, Uruguay, Bolivia, Argentina, East Africa, Namibia, Brazil
Canada, Mexico, Brazil, Tanzania, Madagascar, Sri Lanka
Violet, White, Colorless, Blue, Red, Green, Yellow, pink
Yellow, Red, Brown, yellowish orange