TTO 0100 1970s Faux Cameo Brooch 1970s Faux cameo brooch in a silver-tone metal frame. Crisply moulded with fine detail. The brooch measures 1 3/8" wide by 1 3/4" deep. Ancient and Renaissance cameos were made from semi-precious gemstones, especially the various types of onyx and agate, and any other stones with a flat plane where two contrasting colours meet; these are "hard-stone" cameos. In cheaper modern work, shell and glass are more common. Glass cameo vessels, such as the famous Portland Vase, were also developed by the Romans.