A rare blackish grey mineral occurring as thick, tabular crystals of metallic appearance and consisting of a monoclinic sulphide of lead and…

A steel-grey sulphide of antimony and lead.

Sulph-antimonide of lead, of a lead-grey colour and metallic lustre; geocronite, n.

A grey to grey-blue mineral consisting of a sulphide of lead, antimony, and arsenic and typically occurring as massive or granular deposits in…

= boulangerite, n.

= geocronite, n.

A native sulphide of antimony and lead.

A sulph-antimonide of lead, occurring in twin crystals, of a grey colour and brilliant metallic lustre.

A lead mineral occurring as slender bluish grey prismatic crystals and fibrous or compact masses.