One turquoise near the center slightly differs in size and color - please see our photos with zoom option. The center measures approximately 18n mm in diameter. The item "18K Yellow Gold Turquoise Cabochon Cobalt Blue Enamel Waves Domed Bombe Ring" is in sale since Monday, May 16, 2016. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone".The seller is "stylenow007" and is located in Palisades Park, New Jersey. This item can be shipped worldwide.