Necklace Collection : Diamond, plique-à-jour enamel and gold pendant on a gold necklace, 40.5 cm long… 23 June 2018 3083 Necklace Collection : Diamond, plique-à-jour enamel and gold pendant on a gold necklace, 40.5 cm long, pendant measuring 5 x 3 cm, France, circa 1905.