I bought a used jewellery box for my 7 year old daughter and found this inside. Unfortunately there is no stone,it would have been nice size. Obvious 10 k, looks like a crown and Maltese crosses? Took it to scrap shop and he said 23$ can,it seemed he was very interested,maybe a little more than the 30 bucks he would have got for it. Hope pics are ok (probably sideways)