Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet, pink
Uneven, Brittle, Uneven, Brittle, Uneven
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.