What material is Li Shimin Jade Seal made of?

Li Shimin's jade seal was originally made by himself, and it was made of jade. Later, it was handed down by Qin Shihuang, and it was the legendary jade made by He Shibi. In the 19th year of King Qin (228 BC), Qin defeated Zhao and won the He Shen. Ying Zheng was called the first emperor. Li Si's seal script was ordered to be "ordered by heaven, long live", and Sun Shou, a jade worker in Xianyang, polished and carved it into a seal script. Adopt national decrees. After the demise of the Qin Dynasty, it spread to the Han Dynasty. At the end of the Western Han Dynasty, Wang Mang usurped the throne. At that time, the queen mother was angry and broke a corner of the jade seal. Wang Mang ordered people to repair it with gold until the Eastern Han Dynasty. During the Three Kingdoms period, the 18th Route Governors begged Dong Zhuo, and Sun Jian was the first to enter Luoyang to get the imperial seal. As a result, after his death, Sun Ce, his son, dedicated the imperial seal to Yuan Shu, and borrowed soldiers to lay down Jiangdong. Yuan Shu was destroyed by Cao Cao and got the imperial seal.

Emperor Xian of the Han Dynasty was forced to "abdicate", and Cao Pi built Wei, so people engraved the official seal of "David was given the national seal by the Han Dynasty" on their shoulders to prove that it was not "usurping the Han Dynasty" but actually shattered glass. In 265 AD, following the example, he was called Emperor Wu of Jin, and was renamed Taishi, and the national seal was passed to Jin. In 3 1 1 year, Liu Cong, the former Zhao, captured the emperor Sima Chi, and the national seal was returned to the former Zhao. Nineteen years later, the post-Zhao destroyed the former Zhao and won the national seal. What is even more ingenious is the inscription "Destiny Stone" on the right. Twenty years later, it spread to Wei Ran, and then Wei Ran begged the Eastern Jin army for help. The official seal was cheated by the generals of the Jin army and sent to the capital Jiankang overnight with 300 fine riders. As a result, the official seal was returned to the Sima family of the rulers. During the Southern Dynasties, the national seal was replaced by Song, Qi, Liang and Chen. Sui unified China and returned the national seal to Sui Palace. In March of 6 18, Emperor Yang Guang of Yang Di was killed in Jiangdu (now Yangzhou) and died in Sui Dynasty. After Xiao, Sun, Yang Zhengdao and Chuan Guo Xi fled to Mobei Turkic. At the beginning of the Tang Dynasty, Li Shimin, Emperor Taizong, consoled himself by carving several jade seals such as "Dingbao" and "Dingbao". In 630 AD, Li Jing led an army to crusade against the Turks. In the same year, Emperor Sun Yang and Emperor Yangdi returned to the Central Plains, and the national seal was given to Li Tang, which was a great pleasure for Emperor Taizong.