Identifying whether your gold is 22ct or 24ct involves checking a few key indicators related to purity, hallmarking, and appearance. Here’s how you can determine the carat value of your gold safely and accurately:
1. Check the Hallmark Stamp
The most reliable way is to look for a hallmark, usually engraved in a discreet area of the item (like the inner band of a ring or clasp of a chain).
22ct gold is typically marked as:
22K, 916, or 91.6% purity
24ct gold is usually marked as:
24K, 999, or 99.9% purity
In the UK, hallmarking is regulated by the Assay Office, and all genuine pieces above 1g should carry an official stamp.
2. Observe the Colour
24ct gold has a rich, deep yellow tone and is softer.
22ct gold is slightly less yellow and appears a bit firmer due to the alloy mix.
While colour is not foolproof, it can give a subtle indication, especially when comparing two pieces side by side.
3. Test the Purity (Safely)
If you’re unsure, a jeweller can:
Use an XRF (X-ray fluorescence) machine to verify the metal’s composition without damaging it.
Perform an acid test, though this is less common for high-value or delicate pieces.
At PureJewels, we use professional XRF purity testing—the same standard as the London Assay Office—for precise, non-invasive results.
Want to be sure?
You’re always welcome to bring your item into our London showroom for a complimentary purity check and hallmark explanation.
