Changle sapphire is produced in Changle, Shandong Province. According to the relevant public information, the sapphire mined in Changle, Shandong Province belongs to high-quality sapphire because of its few internal defects. The mineral name of sapphire is corundum, which belongs to corundum family. Sapphire, with its crystal-clear and beautiful color, was covered with mysterious and supernatural colors by the ancients and regarded as an auspicious thing. Sapphire can be divided into blue sapphire and brilliant (non-blue) sapphire. The completion of Shandong Changle Gemstone City is closely related to the discovery, development and utilization of sapphire resources in Shandong and the preferential policies implemented by the local government. Gem City has become one of the largest jewelry distribution centers in China.