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.