CN ensures that the jewelry is manufactured in China, whereas the letter D means solitaire diamond, indicating that just one diamond is Employed in the ring. S925 ALE 54 refers to an international standard for sterling silver jewelry, exactly where ALE is short for Algot Enevoldsen, The daddy of PANDORA, https://slotonline85147.suomiblog.com/detailed-notes-on-jp88-52511712