Antique Estate 18K White Gold Diamond Sapphire Pendant Necklace Earrings Set. The set includes: Antique Estate 18K White Gold Diamond Sapphire Necklace. The piece features one brilliant round diamond in the center surrounded by numerous natural princess cut sapphires and brilliant round diamonds. The total weight of the diamonds in the necklace is almost 1 carat. The total weight of the sapphires is .95 carats. The pendant measures one inch long by 3/4 of an inch wide. It weighs 7.9 grams. Pair of estate 18K white gold diamond and sapphire earrings. Each earring features one brilliant round diamond in the center, surrounded by numerous natural princess cut sapphires and brilliant round diamonds. The total weight of the diamonds in both earrings is 1. 66 carats. The total weight of the sapphires is 2.30 carats. Each piece measures 7/8 of an inch long by 3/4 of an inch wide. The pair weighs 10.7 grams.