'''Sulfosalts''' are [[rare]] [[compounds]] of one or more [[metallic]] [[elements]] with [[sulfur]] plus a [[semimetal]] ([[antimony]], [[arsenic]], [[bismuth]]). Sulfosalt [[minerals]] are soft, heavy, and [[brittle]], and generally occur in small [[crystals]] or masses. They form in [[low-temperature]] [[environments]] and are among the last minerals to develop in [[epithermal]] veins. Chesterman, p. 383
=Sources=
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)