In the ancient times of Chinese civilization, 'jade' had always been a scarce and precious item. There had been a saying since ancient times—"gold is valuable, but jade is priceless."
It was because real jade could only be produced in Lantian. The minerals were depleted, and it was sporadic. For this reason, since ancient times, some of the warm and gentle stone materials were also crowned the name 'jade' and became one in a broad sense to meet the demands of collectors.