18ct White Gold Square Blue John 0.18cts Diamond Stud Earrings, E1334. These unique stud earrings two stunning square shaped pieces of rare Blue John stone that have been directly sourced from Castleton, Derbyshire. The stone is encased within an exquisite 18ct white gold earring setting and surrounded by dazzling 0.18cts of brilliant cut diamonds, creating a breathtaking sparkle. At C W Sellors, we have an expert team of gemstone and diamond specialists who handpick and grade each jewel to meet our high standards and a team of talented in house designers who combine their talents to bring you our exclusive Precious Gemstone collection. You can find other Blue John pieces online and in store to complement these earrings. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions 12mm x 12mm, Blue John; 7mm x 7mm