This U.S. Census Bureau NAICS-based industry comprises establishments primarily engaged in retailing sand, gravel, and stone.

Cross-References. Establishments primarily engaged in--

• Retailing flat glass, glass blocks, plate glass, window glass, and building glass--are classified in U.S. Census Bureau NAICS-based industry 44419021, Glass Dealers; and
• Retailing brick, block, tile, and clay construction materials--are classified in U.S. Census Bureau NAICS-based industry 44419023, Brick, Block, Tile, Clay/Cement Sewer Pipe Dealers.