10K White Gold Blue Diamond Pendant Necklace (1/2 cttw), 18" Classic necklace featuring round-cut blue diamond pendant suspended from white gold rabbit-ear bail Rope chain with spring-ring clasp Blue diamonds may have been treated to improve their appearance or durability. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Domestic Carat weight listed is the total for all stones.