Brown, Colorless, Brown, Brownish, Black, Colorless, Green, Greenish
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
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, UnevenArthur Thomas, Gemstones (2009)
ZrO 2Arthur Thomas , Gemstones (2009)
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.