Abstract
To determine the parentage of pearls nondestructively, the measurement of fluorescence spectra was applied to several kinds of pearls as well as shells. The fluorescence spectra of pearls and shells of genus Haliotis (abalone) were also measured together with those of other species of mother oysters used in pearl culturing. Experimental results indicate that some differences in the spectra make it possible for pearls of genus Haliotis to be distinguished from those of other mother oysters.
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