What XRF actually measures
XRF stands for X-ray fluorescence. The analyser directs low-energy X-rays at your item; the metals in the item respond by emitting their own characteristic energy signature. The instrument reads that signature and reports the exact elemental composition, how much gold, silver, copper, zinc, nickel and so on is actually present.
It does not damage your items
XRF is completely non-destructive. Your items are not scratched, filed, drilled or dipped in acid. They come back to you in exactly the condition you sent them, which matters if you decline the offer and want them returned.
Why it beats the acid test
The traditional acid test works by scratching the item onto a stone and applying acid. It gives an approximate carat range and it marks the item. XRF gives a precise percentage composition and leaves no trace. For anyone selling by weight, the difference between "roughly 9ct" and a measured purity figure is real money.
Hallmark versus XRF
| Hallmark | XRF assay |
|---|---|
| A maker's declaration | A direct measurement |
| Applies to the item when made | Reads the item as it is now |
| Unaffected by later solder or repairs | Detects solder, repairs and mixed alloys |
| Absent on many genuine items | Works with or without a hallmark |
A hallmark is useful, but it is a starting point, not proof of what is in your hand today. XRF is the proof.
What you receive
After the assay we send you a written breakdown of the composition we measured, alongside the weight and the offer it produces. If a result surprises you, you can ask us about it before you decide, and you are always free to decline and have your items returned free of charge.
Common questions
Does XRF damage my jewellery?
No. XRF is non-destructive. Nothing is scratched, filed or acid-tested. Items are returned in the condition you sent them.
Can XRF test items without a hallmark?
Yes. XRF measures the metal directly, so it works whether or not an item is hallmarked.
Is XRF more accurate than the acid test?
Yes. The acid test gives an approximate carat range and marks the item. XRF gives a precise composition and leaves no trace.
Will I see the XRF result?
Yes. You receive a written breakdown of the measured composition with your offer.
What is XRF gold testing and why does it matter?
XRF (X-ray fluorescence) testing fires low-energy X-rays at a precious-metal item and reads the elemental signature returned. It is non-destructive, takes seconds, and returns the gold, silver, platinum and base-metal percentages to within a fraction of one per cent. XRF is not a hallmark and does not replace one. UK assay offices hallmark on the basis of fire assay; XRF is the fast, non-destructive check used across the trade.
Request a free prepaid Royal Mail label
Tell us where to send it. The label arrives by email, usually within about 30 minutes during working hours. Requesting one commits you to nothing: you get a written offer after the XRF assay, and if you decline, your items come back to you free.
Would you rather ask a question first, or send a photo? Message us on WhatsApp . It is the fastest way to get a sense of what something is worth before you post anything.