K10yg Earrings Stone: Blue Topaz, November Birthstone Stamped No backings. I've used these a few times, but haven't worn them recently, so I'm selling them. The back is bezel-set, so you can leave them in without worrying about them catching on anything. There are no noticeable scratches or stains, but I apologize if I've missed anything. Please understand and purchase these items, as they have been stored at home. Please refrain from purchasing if you are concerned or overly sensitive.