Ключевые слова: anhydrite, anthracite, arenite, argillite, bauxite, bituminous, black, calcite, camstone, carbonate, carbonate rock, chalk, chalkstone, coal, collage, collection, conglomerate, coquina, decorative, dolomite, dolostone, flint, geological, geology, isolated, limestone, marl, marlstone, mineral, mudstone, natural, ore, ornamental, pebble, piece, raw, rock, sample, sandstone, sedimentary, set, shale, siltstone, specimen, stone, travertine, tufa, various, white, white background,