Originating from Zhejiang Province, China, this material has been prized since ancient times for use in seals. It seems that high-quality chicken blood stone has already been exhausted? Those from older periods have a vibrant red color! It seems that the current ones are more orange-toned. These are items from my older brother, who has been practicing calligraphy for over fifty years. He has become physically disabled and can no longer write. Most of these items were purchased and stored decades ago. It seems that both ink and paper improve with age, but it's all Greek to me? There are too many items, and it takes time to research them. I will be listing them little by little, so I would be happy if you could take a look when you have some free time. Thank you for looking.