I love to play with chain!  This basic necklace is easy to make, just attach a lobster claw clasp to one end of a 20-inch length of chain and only a headpin charm to the other, (note that a jump ring is not needed here because the clasp will fit into the chains’ links).   To style it into a lavaliere, I attached a white sapphire pendant to the center and added two chain festoons with jump rings.  The balance is achieved by adding a headpin charm to each side of the festoons.  Simple elegance!