Used a few times after purchase. There are no noticeable scratches or stains, but please be aware that there may be a slight feeling of use due to simple storage by an amateur. Size: Approximately 15.8 * 15.7mm, Adjustable Fossil coral (Japanese name: fossil coral) is coral that has undergone fossilization over 100 million years ago, absorbing a lot of quartz and becoming agate. Also, the chrysanthemum-like pattern that appears is a cross-section pattern of the coral. The color may look slightly different from the actual product, so please understand this before purchasing.