Originating in 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 practiced 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 are better 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 grateful if you would take a look when you have the time. Thank you for looking.