• Bonstone Materials Corporation

• Briar Hill Stone Co.

• Buechel Stone Corp.

• California Mantel, Inc

• Delaware Quarries, Inc.

• Impression

• Johnson Fain Partners

• Mankato Kasota Stone, Inc

• MetaStone Inc.

• Milestone Imports

• New England Thinstones

• Norfield Corp.

• SealGuard USA

• Stone Legends

• Stone Magic

• Stone Panels, Inc.

• StonePly

• StoneSheets

• Surebond

• Vermont Structural Slate Company, Inc.