Ideal for use on both light and dark surfaces, Koh-I-Noor Gioconda Artist's Charcoal Pencils are favored by artists for their lush, vibrant colors. Made from high-quality , pure, micro-pulverized pigments, these charcoal pencils can be used for shading and detail work in drawings, sketches, and portraits, either alone or combined with conventional charcoal and other media.