Ключевые слова: adornment, agata muschiata, agate, birthstone, carnelian, chalcedony, colorful, concentric, crystal, gem, gemology, gemstone, geode, geological, geology, healing, jewelery, jewelry, marble, material, mine, mineral, mineralogy, natural, nodules, onyx, onyx stone, peridote, polished, precious, quartz, rock, rough, semiprecious, silica, slice, split, stone, striped, texture, translucent, transparent, turritella, uncut, veins, volcanic, white,