LUSTERING

Gravel; Sand; Aquarium gravel; Aquarium sand; Artificial stone; Cast stone garden and household ornaments; Cobbles and boulders; Decorative aquarium stones; Decorative glass for building; Glass bricks; Glass granules for road marking; Glass tiles; Marble; Non-metal building flashing; Non-metallic minerals for building or construction; Non-precious stones for garden or ornamental use; Paving stone; Play sand; Rock crystal; Works of art of stone, concrete or marble