ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Irregular, Brittle, Conchoidal
{001} Distinct
On {011}, distinct; on {001}, {013}, indistinct
ZrO 2Arthur Thomas , Gemstones (2009)
PbMoO 4Walter Schumann , Gemstones of the world (2001)