ACG Materials acquires Diamond Gypsum : Pit Quarry
Jul 31, 2017· ACG Materials purchased Diamond Gypsum Co., a Watonga, Oklomabased mining company that owns and operates a quarry in central Okloma and offers its customers aggregate and processed gypsum products. "We are excited to further strengthen our position as the leading industrial mineral and aggregate producer in the Midwest," says Paul Harrington, CEO of ACG Materials.