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Show Gypsum Plentiful Gypsum has been exploited commercially com-mercially in the United States since 1835, when the J. B. King Company Com-pany of Few York, N.Y., imported gypsum rock from Nova Scotia. Subsequently, Sub-sequently, large gypsum deposits were discovered throughout the United Unit-ed States, particularly in Western New York state, Northern Ohio, Michigan, Iowa, Texas, California and Kansas. Gypsum is used extensively exten-sively in building because of its fire-resistive qualities. |