Type: Domestic mineral, Nishiki-koseki from Sado. This is a raw stone (unpolished stone) that is currently difficult to obtain. The base is made of clay and can be removed. #Red Stone #Suiseki #Red Stone Height: 65mm Width: 50mm Depth: 36mm Weight: 126g The color changes to a polished appearance when water is applied. Water basin and sand are not included. Sado Nishiki-koseki is characterized by its beautiful color, which is primarily red. Even with a search, most are polished stones, and unpolished stones are almost nonexistent, so you can see how valuable this is.