Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

Recently with a development of new technology of the cultured pearls in China, she produces the bigger, round, luster and various colored cultured bread pearls than ever. There is no great difference in the appearance between the cultured freshwater pearls and cultured`seawater pearls. Accordingly, it could be done for the specialist to distinguish the differences. In this study, we develop how to distinguish two kinds of pearls, that is, we take advantage of fluorescence on the spectrophotometer, and investigate the difference of the inner structure of the pearls, the surface roughness between two of them by using SEM. As the result of XRD analysis, the cultured freshwater pearls show the mineral atomic structure of aragonite. The result of the ICP-AES analysis shows that much amount of P and Mn was found in freshwater pearls, and much amount of Mg and K was found in seawater pearls.