A 9kt gold chain is real gold, not a lesser version of it and not plated. It carries 37.5% pure gold, alloyed with metals like copper, silver, or zinc for strength, which is exactly what makes it hold up to daily wear. But with so many sellers online, it's fair to want a way to check that what you're wearing, or about to buy, is genuinely 9kt gold. Here's what actually tells you.
1. Look for the 375 Hallmark
The most reliable sign is the hallmark stamp. On a genuine 9kt gold chain, you'll find "375" stamped somewhere on the clasp or a small tag near it. That number is the purity in parts per thousand, 375 out of 1000, which works out to 37.5% pure gold. A BIS-hallmarked piece will also carry the BIS mark and a HUID number, which you can verify against your invoice. If there's no stamp at all, that's worth asking about before you buy.
2. Check the Weight and Feel
Genuine 9kt gold has a certain density to it. It won't feel as heavy as 22kt gold of the same size, since it has less pure gold in the mix, but it should still feel substantial rather than hollow or unusually light. A chain that feels suspiciously light for its size is worth a second look.
3. Check the Colour
9kt gold has a slightly softer, paler yellow than 22kt gold, because of the higher proportion of alloy metals. This isn't a flaw. It's simply what 9kt gold looks like, and it's part of why it holds its shape and resists dents better than higher-purity gold. A chain that looks unnaturally bright or yellow for its stated purity is worth questioning.
4. A Genuine 9kt Gold Chain Won't Stick to a Magnet
Gold itself is not magnetic. If a chain is strongly attracted to a magnet, that's a sign it may contain base metals well beyond what a 9kt gold alloy should have, or isn't gold at all. This isn't a foolproof test on its own, since some genuine pieces have small magnetic clasps or fittings, but it's a useful first check.
5. Leave the Acid Test to a Professional
Jewellers sometimes use an acid test to confirm purity. It's accurate, but it can mark the piece if done incorrectly, so this is one to leave to a jeweller rather than trying at home.
6. Buy From a Source That Hallmarks Its Gold
The simplest way to avoid the guesswork above is to buy from a source that hallmarks every piece and states the purity clearly upfront. That's the standard every chain in our collection is held to, with the 375 hallmark and purity clearly listed on each product page.
Why 9kt Specifically
9kt gold sits at a specific point on the purity scale: real gold, alloyed enough to handle daily wear, and priced well below 18kt or 22kt for a similar look. That combination is why it's become a common choice for a chain that's meant to be worn every day rather than saved for occasions.
If you're shopping for one, our 9kt gold chains collection lists the purity and hallmark details on every piece.
Frequently Asked Questions
How can I tell if my 9kt gold chain is real?
Look for a "375" hallmark stamp near the clasp, check that it has some weight to it, and confirm it isn't strongly magnetic. For certainty, buy from a source that lists the hallmark and purity on the product page.
What does the 375 stamp on a gold chain mean?
375 means the piece is 37.5% pure gold by weight, which is the purity level defined as 9 karat gold. It's stamped in parts per thousand, so 375 out of 1000.
Is 9kt gold real gold?
Yes. 9kt gold is real, solid gold alloyed with other metals for strength. It is not plated and not fake, just a lower purity than 18kt or 22kt gold.
Does a 9kt gold chain stick to a magnet?
No, gold itself isn't magnetic. Strong attraction to a magnet is a sign a piece may not be genuine gold, though this should be one check among several, not the only one.
