Australia, Canada, Guatemala, Italy, Kenya, Mexico, Turkey, Mexico, Guatemala, Mexico, Guatemala
Brazil, Madagascar, Russia, USA, Mexico, Pakistan, brown, Yellow, Orange, Brazil, Sri Lanka, Pakistan, Russia, brown, Yellow, Orange, Brazil, Sri Lanka, Pakistan, Russia
Brown, Green
Yellow, Blue, Green, Red, White, Colorless, Blue, Red, Green, Yellow, pink, Brown
Conchoidal, ConchoidalWalter Schumann, Conchoidal
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle