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