Ключевые слова: beauty, blue, brilliance, clarity, closeup, crystalline, crystallography, crystals, dark background, facets, gem, gemological, gemology, gemstone, gemstone industry, gemstones, geology, glinting, glistening, glittery, group, jewelry, light, lustrous, mineral, mineral growth, mineralogy, minerals, minerals classification, opalescent, overlapping, precious, prismatic, purple, radiance, random pattern, reflecting, reflexivity, sheen, shiny, sparkle, sparkling, standing, translucent, transparence, transparent, vibrant, vivid,