Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Distinct on {10 1 1}, imperfect on {01 1 2}
Perfect on [10 1 1] three directions with angle of 74° 55
Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.