Gravel; Limestone; Macadam; Quartz; Rhyolite; Sand; Sandstone; Aquarium sand; Artificial stone; Cobbles and boulders; Decorative aquarium stones; Geotextiles for the purposes of drainage, stabilizing inclines, recultivation, plant support, absorption, filtration, separation, stabilization and reinforcement of the soil; Natural stone; Parquet flooring; Paving stones; Porphyry; Rock crystal; Slag stone; Wood tar; Works of art of stone, concrete or marble