Listing description What is Arsenopyrite? Arsenopyrite is an iron arsenic sulfide. It is the most common arsenic mineral and the primary ore of arsenic metal. Detailed description Arsenopyrite is most often found as a hydrothermal vein mineral and sometimes as a mineral of contact metamorphism. It is sometimes referred to in old texts as "mispickel". Physical Properties of Arsenopyrite Chemical Classification sulfide Color silver white to steel gray Streak dark grayish black Luster metallic Diaphaneity opaque Cleavage poor Mohs Hardness 5.5 to 6 Specific Gravity 5.9 to 6.2 Diagnostic Properties smells like garlic when crushed, crystal form Chemical Composition iron arsenic sulfide, FeAsS Crystal System monoclinic Uses poison
Metals such as cobalt, tantalum, tungsten and molybdenum, which are traded in relatively small quantities. As opposed to metals such as aluminium or copper which are traded in very large quantities.