Inkstone Size of the inkstone: 18 x 12 x 3 cm Weight: Approximately 1500 grams I received this from someone who was a calligraphy teacher in the early Showa era, but I am selling it because I don't use it. As shown in the image, there are scratches on the back. It is in the condition I received it. I do not know the details, so I cannot answer specialized questions. Please refrain from purchasing if you are sensitive to such things. Calligraphy, Shodo (Japanese calligraphy), Sumi-e (ink wash painting), Suibokuga (ink wash painting), Sumi (ink), Tankei (a type of inkstone) Japanese painting, ink wash painting, teacher, master, natural stone Amatasuzuri (a type of inkstone), Suzuri (inkstone), antique