Ключевые слова: abstract, africa, agate, amorphous, background, black, blue, brown, chalcedony, color, concentric, crystal, crystalline, cut, dendrites, drawings, drum, eye, fashion, flat, fortress, gemstone, gray, green, landscape, mossy, natural, nature, onyx, orange, parallel, pieces, polished, quartz, quartzite, red, rocks, rose, ruins, spa, stone, strips, structure, together, volcanic, waves, welded, white, yellow, zonal,