Understanding X-ray fluorescence (XRF) Gold Testing: How It Actually Works

If you’ve sold gold at a reputable dealer, you’ve probably seen your item placed under a small handheld or benchtop device before a price is quoted. That’s an X-ray fluorescence (XRF) analyser, and it’s the closest thing the industry has to a definitive, non-destructive purity test.

What X-ray fluorescence (XRF) actually measures

The device fires a low-level X-ray at the surface of your item. Different metals fluoresce — emit their own characteristic X-ray energy — in response, and the analyser reads that signature to identify exactly which metals are present and in what proportion. Within seconds, it returns a purity reading far more precise than a visual inspection or a hallmark alone.

Why it beats older methods

• Acid testing can damage jewellery and only gives an approximate purity band.
• Hallmarks tell you what an item was stamped as when made — not necessarily what it still is, especially with older, repaired, or plated pieces.
• The magnet test only rules out some obvious fakes; plenty of fake gold is non-magnetic too.

X-ray fluorescence (XRF) doesn’t damage your item, doesn’t rely on trusting an old stamp, and gives a specific percentage rather than a rough estimate.

What it means for your quote

Once purity is confirmed, your payout is calculated from three numbers: purity (from the X-ray fluorescence (XRF) reading), weight (from trade-approved scales), and the live spot price on the day. A transparent dealer will walk you through each step rather than presenting a single unexplained figure.

Does X-ray fluorescence (XRF) only read the surface?

It’s a fair question, since X-ray fluorescence (XRF) technically measures the surface layer. This is why reputable buyers combine X-ray fluorescence (XRF) with a visual and physical inspection — checking for gold-plated base metal, weighted items, or filled pieces — rather than relying on the reading in isolation.

What to expect at Top Gold

Every item is tested with X-ray fluorescence (XRF) technology at our counter, in full view, before we quote a price. You’ll see the purity reading, the weight, and the live spot rate used to calculate your offer. Book a free valuation — no appointment needed.

X-ray fluorescence (XRF) testing at Top Gold

Both Top Gold stores, in Ryde and Hurstville, use X-ray fluorescence (XRF) analysis on every item. The reading appears on screen in front of you, listing the percentage of gold, silver, copper and other metals, so you can see exactly how your offer is calculated against today’s live rates.

FAQs

Is X-ray fluorescence (XRF) more accurate than acid testing?

X-ray fluorescence (XRF) gives a precise percentage reading without damaging the item, whereas acid testing gives a rough karat range and leaves a mark.

Can X-ray fluorescence (XRF) detect gold plating?

X-ray fluorescence (XRF) reads the surface layer, so for suspected plating we assess the piece further before making an offer.

Is testing free?

Yes. X-ray fluorescence (XRF) testing and valuations are free, with no obligation to sell.