XPS and AES depth composition profile studies were carried on to understand chemical components of (100) surfaces for Chengde hypersthene from Hebei Province, China, and Banible enstatite from Norway. Also, to understand the microtopography of them the AFM observation was carried on. There are obvious differences between chemical components of (100) surface and those of mineral inner. Compared with inner mineral Si4+ proportion in total cations has no distinguished variation, whereas Ca2+ and A13+ proportions increase respectively, and Mg2+ proportion decreases. AES depth composition profile of 2000s shows that at a depth of 70 nm the atomic concentrations (%) for each element (except Si in Chengde hypersthene) slightly go up and down, but the average values have no obvious change. On the profile, the atomic concentrations (%) of Al and Si for Chengde hypersthene present a compensated relationship. Obviously, the Si and Al must have the relationship of iso-morphic replacement on the (100) surface. The i XPS and AES depth composition profile studies were carried on to understand chemical components of (100) surfaces for Chengde hypersthene from Hebei Province, China, and Banible enstatite from Norway. Also, understand the microtopography of them the AFM observation was carried on. There are obvious differences between chemical components of (100) surface and those of mineral inner. Compared with inner mineral Si4 + proportion in total cations has no distinguished variation, but Ca2 + and A13 + proportions increase, respectively, and Mg2 + Proportion decreases. shows that at a depth of 70 nm the atomic concentrations (%) for each element (except Si in Chengde hypersthene) slightly go up and down, but the average values ​​have no obvious change. Al and Si for Chengde hypersthene present a compensated relationship. Obviously, the Si and Al must have the relationship of iso-morphic replacement on the (1 00) surface. The i