The stone's material is unknown. Please make your own judgment if you have allergies. Please refer to the photos for the detailed condition. We can add more photos if needed. Please feel free to comment. As this is stored at home by an amateur, those who are particular about quality and storage conditions, are sensitive, have strict evaluation standards, or are concerned about dirt, scratches, or wrinkles that cannot be confirmed in the images, please refrain from purchasing to avoid trouble. Returns and exchanges are not accepted.