H.I.G. Capital portfolio company Harrison Gypsum has acquired J.A. Jack & Sons, a miner and processor of limestone products sold into glass, plaster, agriculture and coatings applications, among others. The company owns and operates a quarry in the Canadian province of British Columbia and ships rock to a processing facility in Seattle. Backed by H.I.G. in late 2012, HG is a vertically integrated producer and processor of high-quality minerals and aggregates based in the U.S. South.