lavalliere

Underneath, he tended to wear a turtleneck adorned with some sort of necklace—African beads, a lavalliere on a string—and he often sported half a dozen rings.

From The New Yorker ● Dec. 3, 2018

Beneath that pompadour, however, her face was aglow with interest and her eyes gleamed almost as brightly as did the brand-new lavalliere and the bar pin with its huge six-carat center diamond.

From Flowing Gold by Rex Ellingwood Beach

So the girl promptly clasped her lavalliere around her neck and openly displayed it, as a proud defiance, if not a direct challenge, to that detestable sneer.

From Aunt Jane's Nieces out West by L. Frank (Lyman Frank) Baum

Then she held up a dainty lavalliere, with a pendant containing a superb pearl.

From Aunt Jane's Nieces out West by L. Frank (Lyman Frank) Baum

It was in the form of a diamond and ruby lavalliere that he had found the day before in a pawn shop and that Mrs. Fowler had identified as Sylvia's.

From The Girl at Central by Geraldine Bonner