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, Russia, USA, Mexico, Pakistan, brown, Yellow, Orange, Sri Lanka
Yellow
Yellow, Blue, Green, Red, White, Colorless, pink, Brown
Not Available
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle