CN signifies that the jewelry is made in China, whereas the letter D means solitaire diamond, indicating that just one diamond is Utilized in the ring. Hence, if a hoop has N 925 Cn stamped on it, It's a all-natural sterling silver ring made in China. CCD on a hoop https://elliottkxfpy.blogkoo.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-jp88-56171028