ACG Materials

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Founded in 1955, Harrison Gypsum Company controls all aspects of gypsum mining, processing and packaging operations. Based in Norman, Okla., it produces gypsum at three mine locations throughout western Oklahoma. In addition to gypsum, the firm mines an anhydrite formation at its Cyril quarry, offering a pure form of anhydrous calcium sulfate for specialty applications. Apart from these, it offers custom products and a series of ground gypsum products, such as flame retardant fillers, animal feed additives, agricultural/turf products and a high-purity food and pharmaceutical grade gypsum.