12 Karat Gold Filled Marked CM, this set is beautiful with open back stones in clear and a very light Blue all are prong set. The diamond shape drop is 1/2" and hangs loose so it has a dangle to it. Earrings are screw back with 3 clear stones and one larger blue stone and they measure 3/4". Necklace measures 15" this set is in excellent condition and the craftsmanship is really something else a set you will not be disappointed in or ashamed to wear to any event. Thanks for stopping in to see our shop.