Black, Red, Brown
Colorless, Reddish, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet, White, Colorless, Blue, Green, Brown, Yellow, pink, Violet, White, pink, Green, Yellow, Violet
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009)
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.