Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
Grey, Brown, Green, Colorless, White
Uneven, Brittle, Uneven, Brittle, Uneven
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.