Ключевые слова: aggregate, background, beautiful, beryl, beryllium, bixbite, black, cluster, crystal, crystalline, emerald, expensive, gem, gemmy, gemstone, geology, geoology, glass, glassy, hexagonal, hydrothermal, isolated, jewelry, matrix, mine, mineral, mineralogy, ore, pegmatite, precious, pretty, rare, red, rhyolite, riches, rock, ruby, sample, specimen, stone, transparent, treasure, usa, utah, valuable, wealth,