Material...PT900 Since this item has been stored at home, it is listed as "Like New." I am selling this because I don't have pierced ears. I believe the stone is either blue topaz or aquamarine, but I'm not certain. One earring. Hallmark on the post. Please note that this item will be shipped without a case and with simple packaging. Please refrain from purchasing if you are overly concerned about details. *For the purpose of preventing trouble, returns, exchanges, and cancellations are not accepted.*