Is the white marble dragon seal valuable in Qianlong period?

Valuable, priceless, from the Qianlong period, with cultural relics and economic value. Emperor Gaozong Qianlong of the Qing Dynasty, named Li Hong, loved Xinjue Roche. Kangxi fifty years (Xin Mao, 17 1 1), was born on August 13th. Yong Zhengdi's fourth son, the fourth son of Sejong in Qing Dynasty, is the filial cow Zhilu. Li Hong was loved by his grandfather, Emperor Kangxi, and was imprisoned in the palace. In the first year of Yongzheng (1723), Emperor Sejong of the Qing Dynasty made him the Crown Prince, and in the eleventh year of Yongzheng (1733), he was named Prince Heshuobo, and in the thirteenth year of Yongzheng (1735), he ascended the throne with the title of Qianlong.