Ключевые слова: abstract, agate, amethyst, background, closeup, colorful, crystal, decorative, design, detail, disc, gem, gemology, gemstone, geode, geology, jewel, macro, mineral, mineralogy, nature, ornament, pattern, polished, purple, rock, semiprecious, shiny, silica, slice, specimen, stone, striped, structure, surface, texture,