London Blue Topaz Marquise Twist Pendant Necklace Sterling Silver Rhodium Nickel Finish 1.75 Carats London Blue Topaz, Midnight Blue Hue with Brilliant Sparkle Pendant is in .925 Sterling Silver and finished with Rhodium Top Quality Craftsmanship Exceptional Styling 30 Day Return Policy All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.