CN means that the jewellery is created in China, whereas the letter D means solitaire diamond, indicating that only one diamond is used in the ring. For that reason, if a ring has N 925 Cn stamped on it, It is just a normal sterling silver ring produced in China. https://baccaratterpercayapastiba36813.webbuzzfeed.com/37301814/not-known-facts-about-jp88