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a very heavy, soft, white, sweetish-tasting halide mineral, formed by the alteration of other mercury minerals, such as cinnabar or amalgams. Calomel is found together with native mercury, cinnabar, calcite, limonite, and clay, at Moschellandsberg, Ger.; Zimapan, Mexico; and Brewster county, Texas, U.S. For detailed physical properties, see halide mineral (table)