or sulphide mineral
Pyrite from Butte, Mont.
Any member of a group of compounds of sulfur
with one or more metals. The metals that occur most commonly are iron, copper, nickel, lead, cobalt, silver, and zinc. They are the ore minerals of most metals used by industry (e.g., antimony, bismuth, copper, lead, nickel, and zinc). Other industrially important metals such as cadmium and selenium occur in trace amounts in numerous common sulfides and are recovered in refining processes.
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.