CN ensures that the jewelry is manufactured in China, While the letter D stands for 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, This is a normal sterling silver ring manufactured in China. https://jaidenvzdhk.amoblog.com/the-smart-trick-of-jp88-that-nobody-is-discussing-58661709