Jin Ink Stone- A natural stone for grinding ink sticks. Each stone has been hand-carved and made in China using an ancient process dating back to the year 618. This unique stoneware celebrates the beauty of nature depicting a bamboo design from the Qing Dynasty. It is pure black, ideal for watercolor, sumi brush painting, drawing and calligraphy. The outside diameter is approximately 5 inches, the inside well is approximately 3-1/4 inches wide and 3/4 inches deep. The lid features two convenient finger holes for easy handling. Each Jin Stone is packaged in a silk covered case with a rich deep red velvet lined interior.