I've noticed this trend coming a while ago after a season when rocky-glamorous jewellery craze was on. After wearing a big, heavy, dangerous sometimes necklaces we couldn't just return to having a small neck-chains. There are also some extreme version like a very big ones even to the navel but lets focuse on these gorgeous Oscar de la Renta's necklaces. They are elegant, can be a point to a simple dress or round neck sweater. Sold out on net-a-porter.