Abstract: The chicken-blood stone can be divided into two main types of Changhua stone and Baling stone by their origins. There are differences in blood color, blood quantity, blood type, ground′color, transparency, luster, hardness, impurities and cracks between two types of chicken-blood stones, which becomes the important criterion for distinguishing the chicken-blood stones. In this paper, the X-ray powder diffractometry is used for distinguishing Changhua chicken-blood stone and Baling chicken-blood stone and for rapid and accurate identification of genuine and fake bloods in chicken-blood stones.