Goldtone Diamante Car Brooch Delightful little Classic Car. In goldtone metal, studded with Diamante on roof. body and hubcaps. Evocative of the 1920s, this brooch probably dates from the 1970s. Has a good, quality weight and feel. Perfect for those Classic Car Rallies...or the London to Brighton! The brooch measures 2" wide and 1" deep Metallic gold, such as in paint, is often called goldtone or gold-tone. In model building, the color gold is different from brass. A shiny or metallic silvertone object can be painted with transparent yellow to obtain goldtone.