Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet
Uneven, Brittle, Uneven, Brittle, Uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
SiO 2Ulrich Henn and Claudio C.