Classification Information
Cobbles; Stones; Aquarium gravel; Cast stone garden and household ornaments; Cobbles and boulders; Decorative aquarium stones; Natural stone; Natural stone and stone tile; Natural stone quarry blocks; Non-precious stones for garden or ornamental use; Paving slabs, not of metal; Paving stone; Paving stones; Stepping and footing stones of concrete or wood for use in lawns and pathways; Wall and floor art made of natural stone and stone tile
Nonmetallic Building Materials