CN signifies that the jewellery is manufactured in China, While the letter D means solitaire diamond, indicating that only one diamond is used in the ring. Consequently, if a hoop has N 925 Cn stamped on it, It's a pure sterling silver ring built in China. CCD on a hoop https://felixwhsdm.fireblogz.com/68116270/not-known-facts-about-jp88