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. #RedBallStone #Suiseki #RedStone 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. When you search, you'll find mostly polished stones, and unpolished stones are almost nonexistent, which shows how valuable this is.