Profile: Oglebay Norton Co. is a producer of industrial minerals, ranging from crushed and graded limestone to value-added materials. Our primary minerals are limestone and industrial sands. Our hydrated lime is available in several grades to meet a variety of applications. Our industrial sand products include foundry sands, filtration sands, pulverized sand and industrial sands. Our calcium oxide is produced by calcining high calcium limestone in coal-fired or gas-fired kilns.