An eye-catching 11.3 ct. t.w. London Blue Topaz and quality sterling silver over 18k yellow gold makes this ring from Effy® a stunning accessory. 1 London Blue Topaz Slip-on Prong setting Polished finish Lifetime limited liability warranty Imported Product Specifications 11.3 ct. t.w. London Blue Topaz 0.63 in L x 0.5 in W x 0.40 in H Material & Care Sterling silver over 18k Yellow Gold Use silver polishing cloth on silver items