CN ensures that the jewelry is created in China, Whilst the letter D means solitaire diamond, indicating that only one diamond is Utilized in the ring. For that reason, if a hoop has N 925 Cn stamped on it, It is just a pure sterling silver ring built in China. https://linkalternatifcasper7798776.sharebyblog.com/36635680/getting-my-jp88-to-work