CN ensures that the jewellery is made in China, Whilst the letter D means solitaire diamond, indicating that just one diamond is used in the ring. As a result, if a ring has N 925 Cn stamped on it, It is just a natural sterling silver ring designed in China. https://slorgacorhariini63962.life3dblog.com/35628515/5-tips-about-jp88-you-can-use-today