Editing Mineral (section)

====Sulfides====
{{main article|Sulfide minerals}}
[[File:Cinnabar on Dolomite.jpg|right|thumb|Red cinnabar (HgS), a mercury ore, on dolomite.]]
[[File:Geodized brachiopod.jpg|right|thumb|Sphalerite crystal partially encased in [[calcite]] from the [[Devonian]] [[Milwaukee Formation]] of [[Wisconsin]]]]
The [[sulfide minerals]] are chemical compounds of one or more metals or semimetals with a [[chalcogen]] or [[pnictogen]], of which sulfur is most common. Tellurium, arsenic, or selenium can substitute for the sulfur. Sulfides tend to be soft, brittle minerals with a high specific gravity. Many powdered sulfides, such as pyrite, have a sulfurous smell when powdered. Sulfides are susceptible to weathering, and many readily dissolve in water; these dissolved minerals can be later redeposited, which creates enriched secondary ore deposits.<ref>{{harvnb|Chesterman|Lowe|2008}}, p. 357</ref> Sulfides are classified by the ratio of the metal or semimetal to the sulfur, such as M:S equal to 2:1, or 1:1.<ref>{{harvnb|Dyar|Gunter|2008}}, p. 649</ref> Many [[sulfide mineral]]s are economically important as metal [[ore]]s; examples include [[sphalerite]] (ZnS), an ore of zinc, [[galena]] (PbS), an ore of lead, [[cinnabar]] (HgS), an ore of mercury, and [[molybdenite]] (MoS<sub>2</sub>, an ore of molybdenum.<ref>{{harvnb|Dyar|Gunter|2008}}, pp. 651–54</ref> Pyrite (FeS<sub>2</sub>), is the most commonly occurring sulfide, and can be found in most geological environments. It is not, however, an ore of iron, but can be instead oxidized to produce [[sulfuric acid]].<ref>{{harvnb|Dyar|Gunter|2008}}, p. 654</ref> Related to the sulfides are the rare [[Sulfosalt mineral|sulfosalts]], in which a metallic element is bonded to sulfur and a semimetal such as [[antimony]], [[arsenic]], or [[bismuth]]. Like the sulfides, sulfosalts are typically soft, heavy, and brittle minerals.<ref>{{harvnb|Chesterman|Lowe|2008}}, p. 383</ref>