"Suiwa-gyoku" refers to Xiuyu jade. Xiuyu jade is one of the four major jades of China, produced in Xiuyan Manchu Autonomous County, Anshan City, Liaoning Province, known as the "Jade Village" of China. It is a rare and beautiful stone. Since ancient times, it has been believed to be a stone that wards off evil and a power stone with strong healing energy.