Ключевые слова: black background, chrome, chrome diopside, chromediopside, chromian, clear, close up, collection, crystal, crystalline, dark background, decorative, diopside, gem, gemmological, gemmology, gemological, gemology, gemstone, geological, geology, green, jewelry, little, macro, macro shooting, material, mineral, natural, object, ornamental, piece, precious, raw, rock, rough, sample, semiprecious, siberian emerald, small, specimen, stone, structure, surface, texture, textured, translucent, transparent, yakut emerald,