X-Ray Fluorescence Testing
If both the electronic testing and scratch methods do not confirm clear results, pieces are subjected to an X-ray fluorescence scan. The machine used for this test is an incredibly powerful and remarkably expensive state-of-the-art device capable of providing detailed analysis by measuring the intensity of the generated gold X-rays by wavelength dispersion analysis.
When testing is complete, a full report indicates the percentages of gold content as well as other alloying metals such as copper, silver, zinc, etc. This method is remarkably accurate.





