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