This item is from around the mid-Showa era. The material is likely obsidian or onyx. It appears solid black, but depending on the angle, you can see a unique pattern like in the first image. I believe it has been used a few times, so there are some slight scratches when held up to the light. The gold-colored base has no rust or stains. There is no box. It will be wrapped in cushioning material and carefully waterproofed, then shipped via Yu-Packet Post Mini. This item has been stored at home. Please understand and agree to these conditions before purchasing. Thank you.