X-ray fluorescence, commonly shortened to XRF, is a non-destructive method used to identify elements in a material. In bullion dealing it can quickly provide valuable information about metal composition.
What happens during a test
The analyser directs X-rays at the surface. Elements respond with characteristic signals, allowing the instrument to estimate which elements are present and in what proportions near the tested area.
Its strongest advantage
XRF can test without cutting, filing or applying acid. That matters for collector pieces where preserving the surface is important.
Understand the limitation
XRF is primarily a surface technique. Thick plating, unusual construction or inconsistent materials can require additional checks such as weight, dimensions, conductivity, ultrasound or other appropriate methods.
Confidence comes from context
Testing works best alongside transparent specifications, reputable sourcing and physical inspection. No single clue should carry the entire authenticity decision.