Afghanistan, Brazil, Southern and central Africa, Madagascar, Russia, USA, Zimbabwe
Brazil, Madagascar, Russia, USA, Mexico, Pakistan, brown, Yellow, Orange, Brazil, Sri Lanka, Pakistan, Russia, brown, Yellow, Orange, Brazil, Sri Lanka, Pakistan, Russia
Colorless, Blue
Yellow, Blue, Green, Red, White, Colorless, Blue, Red, Green, Yellow, pink, Brown
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle