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https://www.ssef.ch/wp-content/uploads/2022/03/411_Cobalt-spinel-jpg.webp1024677Radiometric U-Pb dating is a promising tool in gemstone testing and is used at SSEF as an advanced analytical procedure since several years. However, this method is usually only applicable when the gemstone presents sufficient traces of radiogenic elements either in its crystal structure or within a solid inclusion in the gemstone.