Ключевые слова: abstract, backdrop, background, brown, building, cinder, clinker, closeup, concrete, construction, crushed, detail, dross, floor, granite, gravel, gray, grey, grit, ground, grunge, hard, limestone, material, metallurgy, mineral, natural, nature, outdoor, pattern, pebble, road, rock, rocky, rough, rubble, scoria, shape, sinter, slag, small, stone, strand, structure, surface, texture, track, wall, waste,