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. S925 ALE fifty four refers to an international common for sterling silver jewellery, where ALE is brief for Algot Enevoldsen, the father of PANDORA, https://trevorswafi.thenerdsblog.com/42753861/rumored-buzz-on-jp88