Hopeite

It also forms druzy encrustations and reniform (kidney-shaped) masses.

The related mineral parahopeite, which has the same composition but different crystal structure, is triclinic.

The minerals are formed through oxidation of sphalerite by the presence of phosphate-rich solutions.

It was first described in 1822 from Moresnet, Liège Province, Belgium and is named after Scottish chemist, Thomas Charles Hope (1766–1844) of the University of Edinburgh.

Hopeite is one of the two conversion minerals arising from the application of the rust converter 'Fertan'.

Orange-brown hopeite prisms to 3 mm on a nearly solid matrix of glassy, pastel yellow-green parahopeite crystals. Locality: Kabwe Mine (Broken Hill Mine), Kabwe , Central Province , Zambia. Broken Hill is the type locality for parahopeite.