This is a natural stone inkstone of unknown origin. It was initially completely black with residual ink. After some cleaning, a reddish-black color emerged, and beneath that, a bluish-tinged base appeared. I believe this type of base color is characteristic of Duan inkstones (Song Kang?) or Chengni inkstones, but I can't say for sure. However, it's a very good inkstone, and the stone patterns are quite impressive. It features beautiful cloud and dragon carvings, and what appears to be stone eyes are also visible. I'm offering it at a fairly low price this time. What do you think of this price?