Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Distinct on {001} and {110}, indistinct on {100}
[001] good, [210] distinct
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references