THE USE OF ENERGY-DISPERCIVE X-RAY FLUORESCENCE ANALYSIS IN THE DIAGNOSIS OF DIAMONDS
DOI:
https://doi.org/10.31733/2078-3566-2023-4-200-211Keywords:
diamonds, gemological research, energy-dispersive X-ray fluorescence analysis.Abstract
One of the difficult tasks of the forensic gemological examination is the diagnosis of diamonds, given the presence on the market of a large number of imitation precious stones, both of natural origin and obtained in laboratory conditions. Due to the high value of diamonds, a non-destructive approach is usually used to diagnose them, which excludes the use of such research methods as determination of hardness, fracture, brittleness, cleavage, etc. Diamonds embedded in jewelry are difficult to diagnose, as it becomes impossible to determine such important diagnostic properties as density, refractive index, and optical character. The possibilities of diagnosing diamonds, precious stones and glass used as imitations of diamonds, using a laboratory energy-dispersive X-ray fluorescence spectrometer ElvaX Pro with a solidstate semiconductor X-ray detector, are considered. It is shown that according to the strictness of such criteria as the number of elements to be determined, the accuracy of the results, the laboriousness and duration of each determination, the method of energy-dispersive X-ray fluorescence analysis is a powerful non-destructive tool for diagnosing diamonds both in the free state and encased in jewelry. It is recommended to use the energy-dispersive X-ray fluorescence analysis method as a fast and reliable instrument for diagnosing diamonds in cases where it is impossible to reliably obtain the parameters necessary for determining the name of the stone (hardness, density, refractive index, optical character) by conventional diagnostic methods.
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