Antimony sulphides

This class of ores contain either gold associated with antimony minerals or the antimony minerals present significantly affect process selection or operating conditions. Aurostibnite (AuSb₃) can present problems in gold ore treatment due to its low solubility in cyanide solutions and poor amalgamation properties. Stibnite (Sb₂S₃) is the main source of antimony metal ad occurs in quartz veins and with Pb-Zn sulphides assemblages. Gold/stibnite associations are rare, though stibnite can occur at sufficiently high concentrations in gold ores to cause problems as a cyanicide. Gold is closely associated with antimonial sulphides at the Blue Spec mine (Australia) and the Consolidated Murchison (South Africa).