Ключевые слова: amethyst, background, beautiful, bright, calcium, clear, closeup, cluster, collection, colorful, crystal, crystalline, crystals, cubic, detail, fluoride, fluorite, fluorspar, gem, gemstone, geology, glass, green, healing, isolated, jewelry, macro, matrix, mineral, mineralogy, natural, nature, ore, precious, purple, quartz, rock, rough, sample, science, semiprecious, shiny, specimen, sphalerite, stone, transparent, uncut, white,