UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
{110} Perfect, {110} Perfect
Perfect on [10 1 1] three directions with angle of 74° 55
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
CaCO 3Ulrich Henn and Claudio C.