The David Yurman Sterling Silver 925 Onyx Pendant Necklace features a square-shaped onyx pendant set in sterling silver, with a lobster closure. The necklace comes with a 20″ box chain and is signed by the brand. The black onyx stone is set in a cushion shape, adding a touch of sophistication to the piece. This stylish necklace is perfect for adding a touch of elegance to any outfit, with its combination of black and silver colors and high-quality materials.