This is raw shell material made from natural seashells that have been cleaned and had their outer skin removed. *Some parts may remain. The back side has a natural luster characteristic of nacre. There are individual differences in shape, thickness, and color. Because it is unprocessed, it has not been drilled, polished, or button-processed. Please use it as a material for your desired processing. Due to the natural material, there may be minor chips, unevenness, etc.