Ключевые слова: background, black, citrine, clear, close, collection, crystal, crystalline, dark, decorative, gem, gemmological, gemmology, gemological, gemology, gemstone, geological, geology, jewelry, little, macro, material, mineral, natural, object, ornamental, pebble, piece, polished, quartz, rock, sample, semiprecious, shooting, small, specimen, stone, structure, surface, texture, textured, translucent, transparent, tumbled, yellow,