sautoir
/ˈsəʊtwɑː
/noun
A long necklace consisting of a fine gold chain and typically set with jewels.Delicate diamond designs in the Edwardian taste are combined with the streamlined outlines of the art deco style in the sautoir (long neck chain) lorgnette shown in Plate XIV.
Origin
1930s: French, extended use of the original word which denoted a harness loop used as a stirrup for ‘jumping’ (from sauter 'to jump') into the saddle.