Guatemala, Russia, Columbia, Canada, Italy
India, Canada, Brazil
White, Red, Brown, Green, gray
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
Splintery, UnevenArthur Thomas, Difficult, Fibrous
Uneven, UnevenArthur Thomas, Gemstones (2009)
NaAlSi 2O 6Ulrich Henn and Claudio C.
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.