This is a paperweight made by KAMEI GLASS (カメイガラス). CRYSTAL 24% It's a weight-shaped design with a hole at the top, allowing a string to be passed through. Could it be used as a Sekimori-ishi (stone to prevent entry)? Please refer to the photos for the size. Although it's unused, there are a few small scratches. There are a few air bubbles inside. There is no box. Please refrain from purchasing if you are concerned, as it has been stored in a drawer for a long time.