More artists make necklaces than any other form of jewelry—and these pieces are among the most exquisite ever created. Selected from over 5,000 entries, they range from unique chokers to artful collars. Some showcase precious metals and gems, while others use more unusual materials, including plastic, wood, paper, and glass. They’re forged, cast, and woven, and have surface embellishments that run the gamut from inlay to enameling. And the variety is simply astonishing: Classic bejeweled chains