White, Reddish, gray, Brown, Brownish
White, Colorless, Yellow
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
SiO 2 + H 2OUlrich Henn and Claudio C.