An arsenopyrite is a silvery-grey ore of arsenic - a mixed arsenide and sulphide of iron, chemical formula FeAsS.

Arsenopyrite isn't really "marketed" as such. This mineral, FeAsS, is the principle ore of arsenic. It is recovered by mining, and it is usually processed on or near the site to recover the arsenic. (It is almost always cheaper to process any ore near the mine because transportation costs associated with moving ore are high.)

At least six: native arsenic, realgar, orpiment, arsenopyrite, lollingite, and enargite.

G. W. Reimers has written:

'Analysis of the oxidation of chalcopyrite, chalcocite, galena, pyrrhotite, marcasite, and arsenopyrite' -- subject(s): Oxidation, Pyrites

P. Bhakta has written:

'Alkaline oxidative leaching of gold-bearing arsenopyrite ores' -- subject(s): Gold, Leaching, Metallurgy, Oxidation, Sodium hydroxide