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Businesses

We own strategically located, proven, long-life reserves of high-quality industrial minerals.

Great Lakes Minerals
The largest and highest-quality limestone producer on the Great Lakes, with quarries, processing plants, docking facilities and the largest fleet of self-unloading U.S.-Flag vessels on the Lakes.

Global Stone
Operates 12 limestone quarries and lime and limestone processing facilities serving customers located primarily in the Mid-Atlantic and southeastern United States.

Performance Minerals
Mines and processes specialized industrial minerals, primarily high-purity silica sands and muscovite mica, with ten facilities in the southwestern United States, two in Ohio and one in North Carolina.
2000 Revenues
Great Lakes Minerals
Global Stone
Performance Minerals