Plaque de Cou

Edwardian Diamond Plaque de Cou, Circa 1900, Designed on one Edge to Conceal the Necklace Clasp. Photo Courtesy of Lang Antiques.

Plaque de cou is the French term ascribed to a central rectangular ornament, usually jeweled, that forms the integral decorative element in a collier de chien or dog collar necklace. The plaque can sit atop a ribbon or be held in place by multiple rows of small pearls or other beads.