Abstract: With the development of the jewelry market in China,the value of high-class jade craftwork is continuously rising,which could promote investment and also increase the probability for more imitations of highclass jade interfused to the market.Brucite is usually used for Mg element or other industrial materials.Lately,the brucite being imitations of larderite and nephrite products is examined by the author.The samples of brucite,nephrite and glass are studied by means of conventional gemmological testing,FTIR and EDXRF.The results show that it is diagnostic significance for identifying the brucite by IR spectrum characteristics,which could distinguish the brucite from the nerphrite,glass and larderite with dickite or/and nacrite and pyrophyllite as main compositions.The minor carbonate mineral in brucite and nephrite samples could be primarily concluded in virtue of IR spectrum anaylsis.