Necklace And Earrings Set .925 Sterling Silver Faceted Prong-Set London Blue Topaz And Sapphire Gemstones = 5.75 Ct. Tw. Lustrous Round White Freshwater Cultured Pearls Measure 6-9.5Mm Earrings: Earrings Drop Approximately 23Mm Omega Post Backs Necklace: Pendant Drops Approximatley 26Mm Chain Approximately 18In Long Spring Ring Clasp It Is Customary To Treat Most Gemstones To Achieve Enhanced Color And Durability. Some Of These Treatments May Not Be Permanent, And May Require Special Care.