Australia, Italy
Afghanistan, Brazil, Southern and central Africa, Madagascar, Russia, USA, Zimbabwe
Yellow, Red, Reddish, Brown, Colorless, White, Yellow, Red, Reddish, Brown, Colorless, White, gray, White, gray, Reddish, White, gray, Reddish, White, gray, Reddish
Colorless, Blue
Conchoidal, Uneven
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)