Why is it that black and silver always look right together? We're not sure either, but we are sure that our new onyx and sterling silver pendant is going to be very popular. (Don't worry, we can make more.) Beautiful in its simplicity, our black onyx necklace features a 3/4" square of onyx framed in .925 sterling silver. The sleek design is suspended from a stylish and comfortable (no hair snags!) 17 inch .925 sterling silver snake chain. We like this necklace best with a white tee or oxford, but we won't mind if you try other combinations. Spring ring clasp.