Fire assay is the most accurate technique, and is considered the legal method for gold hallmarking, but it is a destructive method because you have to melt the piece in order to determine the gold or other metal concentration.

Why Choose XRF for Verifying Jewelry? XRF can nondestructively analyze gold, silver, and platinum group metals, as well as nonprecious alloying metals, contaminants, and gold plating. XRF can even be used to identify certain fake gemstones, such as cubic zirconia, titanite, and leaded glass.

As a rule of thumb the accuracy “out of the box” given by the difference between XRF value and assay can be as good as 0.2 to 0.5% for gold in jewelry, whereas the accuracy out of the box for minerals can be within 20% of the lab assay or even more if the sample is not homogeneous enough.

XRF (X-ray fluorescence) is a non-destructive analytical technique used to determine the elemental composition of materials. XRF analyzers determine the chemistry of a sample by measuring the fluorescent (or secondary) X-ray emitted from a sample when it is excited by a primary X-ray source.

You can generally expect that an XRF gun from a reputable company can cost you between $18,000 and $50,000, with the upper limit being a significantly more advanced machine also.

No, handheld XRF is not dangerous when operated as directed. XRF instruments create X-rays that are ionizing radiation, so you should always minimize your exposure. Handheld XRF power is much lower than imaging X-ray equipment, so XRF users’ exposure is the same as or less than you get from naturally occurring sources.

XRF is very sensitive to small proportions of impurities and electrical copper must be 99.95% in purity for suitable use in cable products. The range of elements which can be detected by XRF is variable depending on instrument configuration meaning the testing can be used in many applications.

The XRF Gold Analyzer is widely used for the analysis of precious metal purity, authenticity and metallization thickness. The XRF Gold Analyzer can accurately analyze the purity of four precious metals: gold, silver, platinum, palladium etc, analytical tolerance range is 0.01% to 0.3%.

The Innov-X GoldXpert XRF analyzer is an easy-to‑use, cost-effective method to obtain alloy chemistry and karat classification with one nondestructive and nonintrusive test. Additionally, an exclusive GoldXpert software feature helps identify gold-plated objects and sends an alert to the screen.

An X-Ray fluorescence gun is essential gold-testing equipment, known to gold professionals by many names, e.g. gold analyzer, gold tester, gold purity scanner, identifier, karat checker, meter, sorter, spectrometer, manual gold purity assayer, an X-Ray machine for gold measurement, or quite simply “a Bruker.”

XRA series Gold Analyzer uses unique optical technology and calculation method to ensure analysis results close to Fire Assay. Many companies know how to assemble a XRF analyzer, but they don’t know how to optimize the whole system, so even if they can finish complete XRF analyzer, but their results are very far away from Fire Assay results.