The jasper produced in the Cassiar mine of Canada and sold in China's market was studied in this paper. The jasper samples were tested by electron microprobe analysis (EPMA). The jasper is mainly composed of tremolite. The conventional gemological properties and characteristics of the jasper samples are consistent with the data of GB/T16553-2011 Jewelry National Standard. Tests show that the Vickers microhardness of the jasper is between 813.6～605.7 N/mm². The IR spectra were obtained by means of squash method and powder Infrared method, and the results show that the former method could provide more information of IR spectra for jasper samples.