Ключевые слова: aggregate, background, beautiful, black, blue, cavansite, close, closeup, cluster, collection, crystal, crystals, cut, design, dimorph, gem, gemology, gemstone, geological, geology, isolated, macro, material, mine, mineral, mineralogy, minerals, natural, nature, nobody, nugget, object, ore, pentagonite, precious, raw, rock, rough, sample, science, semiprecious, shiny, solid, specimen, stone, texture, textured, white, yellow,