I bought this Inkwell in an antique store in Columbus Ohio 20 years ago. It is very heavy and I am not sure how it was made or what it is made of. It feels like a rock but the top appears to pressed from a mold. I put a small vase with a plant on it and the black lacquer came off turning into a green circle. I am not sure if I should try to refurbish my piece or what to use it for. Tracy in Texas.