Quarry Locations

Established in 1917, Sheldon Slate is the premier source of natural slate flooring tile from deposits in the New England region. Our plant in Middle Granville, New York is one of the largest capacity slate tile production mills in North America.

At the quarries, rock and soil overburden is removed to access geologically fresh stone. Drilling and blasting are employed to break large slabs from the deposit. In the primary mill, large slabs are further broken down into flagstone and cutting stock for the secondary mill. "Cleaving" means to split the slate along the rift or natural bedding of the stone and the result is a "natural cleft" surface. In the mill, the prime stock is cut to size and split to the desired thickness. Gauging is performed to further control thickness. Surface finishes include natural cleft, honed and sandblasted.