Blue Topaz and Diamond Necklace and Earring Set. Features earrings of 18KT gold over sterling silver pierce style with 4 oval cut graduated genuine blue topaz and 23 single cut genuine diamonds with solid 14KT gold posts. Necklace is 18KT gold over sterling silver with 3 oval cut graduated genuine blue topaz and 4 single cut genuine diamonds on an 18" adjustable necklace chain. Total gem weight approximately 5.75 Carats. 1 lb each.