Glossary
X-ray fluorescence analysis
X-ray fluorescence analysis determines a precious metal's fineness non-destructively in seconds.
X-ray fluorescence, or XRF, exposes an item to weak X-rays. Each element responds with its own characteristic radiation. The instrument reads the pattern within seconds to determine which metals are present and in what proportions.
The key advantage is that it is non-destructive. Nothing is filed, scratched or dabbed with acid; the item leaves the chamber unchanged. This makes it suitable for cherished inherited pieces and jewellery with stones.
The method has a limit: it measures only the upper micrometres. Very thick gold plating could theoretically mislead it. We therefore supplement it with traditional methods: density testing using weight and volume, and acid testing on a touchstone.
Why measurement pays off in euros
An everyday example: an unmarked 8 gram ring looks like 333 gold but measures 585. At 120,00 € per gram of fine gold, its material value is 561,60 € rather than 319,68 €.
The difference is 241,92 €, solely because the item was measured rather than estimated. We then apply 90 to 95 % of spot to that basis. Judging by appearance alone would not be a reliable basis for either party.
Testing in front of you in Nordhorn
Our Nordhorn instrument is on the counter, not in a back room. You place your item inside yourself, see the result on the display and hear what the numbers mean. Only then do we weigh and calculate.
Testing is free and without obligation, even if you sell nothing. Many people come for exactly this: to find out what is in their jewellery box before deciding on a sale or division of an estate.
Measurement is particularly important for dental gold. Dental alloys often contain varying proportions of platinum, palladium and silver alongside gold, which cannot be judged by eye or read from a hallmark. Only analysis shows what a crown or bridge actually contains.