This is 3 really nice Tie tacks. The prongs and setting for all 3 tie tacks is 10 K gold. One stone looks like a clear diamon9 all thought the pictures make it look bluish) it is 3 karat stone and is actually a clear topaz, The other one is a clear green garnet with 10 k golld setting and is a 1 karat stone. The last one is a 3 karat sone and is a Citrine stone. All are about 50 years old and very seldom ever worn.