Raman and FTIR spectroscopy identified the major mineral phase aragonite as well as some organic compounds. This study presents the first gemological and mineralogical characterization of Australian akoya cultured pearls using Raman, photoluminescence, FTIR, and UV-Vis specular reflectance spectroscopy. Unlike many of their Japanese counterparts, Australian akoya cultured pearls are harvested after 18 months of growth and marketed without any post-harvest treatments involving dyes or bleaches. ABSTRACTĪkoya cultured pearls have been produced on the eastern shoreline of Australia since approximately 1999 using Pinctada imbricata fucata mollusks native to New South Wales. Photo courtesy of Broken Bay Pearls Pty Ltd. A bracelet showing naturally colored blue, cream, yellow, and silver akoya cultured pearls from Broken Bay Pearls.
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