Red, Brown, Brown, Red, Yellow, pink
Colorless, White, Brownish, Reddish, Black, Brownish, Black, Colorless, gray, White, Reddish, Brown
UnevenArthur Thomas, Gemstones (2009) Tough, UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven
Uneven
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Na 3AlF 6Ulrich Henn and Claudio C.