Characterization of Pyrite Inclusions in Lapis Lazuli Using X-ray Fluorescence Micro-imaging

Characterization of Pyrite Inclusions in Lapis Lazuli Using X-ray Fluorescence Micro-imaging

Lapis lazuli is a blue semi-precious gem of the sodalite group. These rocks are characterized by the presence of clusters of golden colored pyrite, the size of which can vary and making attractive patterns on the gems. Thanks to its XY stage, XGT-9000 can provide a wide range of information concerning the elemental distribution in geological samples. Regions of interest can be identified and with the high resolution X-ray guide tube, detailed mapping and point analysis can be performed. In this application note we study pyrite impurities and major elements distribution in a commercial lapis lazuli pendant.

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Characterization of Pyrite Inclusions in Lapis Lazuli Using X-ray Fluorescence Micro-imaging
Lapis lazuli is a deep-blue metamorphic rock used as a semiprecious stone which contains inclusions that can impact its value. Pyrite impurities and major elements distribution are studied with the XGT-9000, HORIBA’s new X-ray microscope.
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