Ключевые слова: agate, chalcedony, crosssection, cut, decorative, gem, gemology, gemstone, geode, geology, green, jewelry, love, marcasite, mineral, natural, object, ornamental, oxides, pattern, pebble, piece, rock, rosequartz, sample, semi precious stone, semigem, semiprecious, shape, shine, shooting, silica, smokyquartz, specimen, stalactite, stone, surface, texture, textured,