Note: ☞ Most cameos are carved in a material which has layers of different colors, such stones as the onyx and sardonyx, and various kinds of shells, being used. The classical cameos made in Italy are carved on a seashell (see cameo conch, below), having an olive figure carved from the inner layer of the shell in relief on the white background of the outer layer of the shell.
Etymology: It. cammeo; akin to F. camée camaïeu, Sp. camafeo, LL. camaeus camahutus; of unknown origin