●1. Material: Natural stone ●2. Due to the natural stone, each crest is unique ●3. Fits in the palm of your hand and can be carried around. Not only can it be used for calligraphy, but also ink painting (ink painting), and postcards ●4. Can be used at home, as a gift for someone special or for commercial use ●5. Can be used for calligraphy, Japanese paintings, water ink paintings, and picture letters