I purchased this a long time ago and used it frequently when I first got it. Please understand that it has been stored at home for a long time. I don't know the material of the purple stone. I can't see it clearly, but there is some kind of engraving, and I think it probably says K10. It can be used as American earrings or as a charm. Although not in the photos, I can include the storage bag and box. Due to the thickness, I will not use cushioning material in the box. Thank you for your understanding.