Sterling Silver Turquoise Toscana  Side Marquise Ring. R513. Discover our stylish Toscana collection with this contemporary sterling silver ring. Simple and elegant, it features a striking marquise shaped cabochon of the finest natural Kingman Turquoise. The highly polished gemstone is complimented by a raised frame and a classic band. We hand-select only the finest quality natural turquoise, which we cut and polish to perfection in our Derbyshire workshop to produce beautifully handcrafted turquoise jewellery. We source our turquoise gemstones from the famous Kingman mine, in North Western Arizona. The Kingman mine is recognised as one of the oldest and largest turquoise mines in America, widely known for producing highly collectable gemstone grade turquoise. Kingman turquoise is distinguished by its unique lustre, striking characteristics and sky-blue colour. Turquoise is the December birthstone.. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 12mm x 4mm.