Abstract:Sapphires occurring in Neogene basalt mainly distribute in Changle of Shandong province, Wenchang of Hainan province, Mingxi of Fujian province and Liuhe of Jiangsu province. The sapphires formed by this genesis always have some defects, such as:dark color, bad diaphaneity, low purity, unpure color tone and unbright color. Through the study on mineralogy and gemology of the sapphires in Changle of Shandong province and contrast with others, it is considered that the sappphires in Changle of Shandong provinc...