Ochre - Yellow iron used as a pigment in clays and glazes.
Octagon Handle - Wood handle with 8 sides used for wood carving tools and rasps. The handle’s shape gives the user a good grip.
Opacity - State of a substance impervious to rays of light.
Opaque Alabaster - Medium hard grade carving stone, indigenous to Italy and the western United States, through which light cannot pass.
Organic Forms - Containing carbon.
Organic Materials - Materials produced without chemical aid.
Original - First model or cast produced by a sculptor.
Oversized Handle - Large, normally round, handle used for wood carving with the larger sweep tools, generally over 2 inches in diameter.
Oxblood - Reddish medium brown color used as a pigment for glazes.
Oxidation - Color change in metals due to exposure to oxygen; forms a patina or coloration on bronze statues.
Oxide - A binary compound of oxygen with another element.
Ozark Stone - An extremely fine grain sharpening stone from the southern region of the United States used to sharpen wood and stone carving tools.