Ключевые слова: agate, amethyst, beauty, collecting, composition, crystalline, crystals, discovery, earth, formation, garnet, gemology, gems, gemstones, geology, healing, jasper, jewelry, jewels, luster, mineral, mineralogy, natural, onyx, ore, polishing, precious, quarry, quartz, rare, raw, rocks, specimen, stones, turquoise, valuable,