This is a "Covered Ink Pond" from Duanxi. Inkstone: Approximately 13.7cm on each side, Height: Approximately 3.0cm Cover: Approximately 13.7cm on each side, Height: Approximately 1.0cm Inkwell: Inner diameter: Approximately 11.6cm, Depth: Approximately 1.5cm Weight: Approximately 1490g (including cover) As it belonged to my great-grandfather, a calligrapher born in the Meiji era, the manufacturing period is estimated to be during the Qing Dynasty, and it is believed to be an item that can be classified as "Old Duanxi." The color and stone patterns suggest it is undoubtedly Duanxi, but the specific mine has not been identified. As it is an old item, there are scratches, scuffs, and minor chips in various places. Also, this is just an amateur assessment, and since I did not purchase it myself, I sincerely apologize, but I cannot guarantee the quality or origin. Please refer to the images and judge the quality and degree of deterioration with your own eyes. m(_ _)m Furthermore, due to its unique shape, it is not suitable for the so-called "shodo" (calligraphy) practice. It would be appreciated if you could use it when creating relatively large works on rice paper, etc.