From JCrew: "This sparkling stunner has a '30s-era Deco feel, with hundreds of tiny crystals pavé set in movable brass castings. We spent months perfecting the vintage gold plating to give it a timeworn heirloom look. Glass crystals pavé set in an Old English brass-plated zinc casting with brass links. Signature spring clasp closure. Import. Length: 18"."

Available in crystal. Styled by Cupcakes and Cashmere here and here.