Mikimoto sterling necklace with a sterling pendant in a horse shoe shape topped with a black onyx containing 3 cultured 7 mm pearls. The chain necklace is 23 1/2" and the pendant including the bail is 1 1/8". Marked with the Mikimoto clam shell and an S, which in Japan means sterling, on the back of the pendant. Excellent vintage condition. If you buy this necklace you will remember never to hang your horse shoe upside down. Texans believe that lets the luck out. Lucky horse shoes are hung with the open end up.