Ключевые слова: aggregate, amethyst, beautiful, black, blue, bright, brush, celestine, celestite, closeup, collection, colored, crude, crystallization, crystals, cutout, decorative, druse, fine, formation, gem, gemology, gemstone, geological, geology, isolated, jewel, jewelry, mineral, mineralization, mineralogy, mining, natural, nature, object, pebble, piece, precious, raw, rock, rough, science, specimen, stone, sulphate, vivid, wild,