Gold Karats in Canada: 9K to 22K, and What the Law Requires
In Canada, the lowest quality that may legally carry a gold quality mark is 9 karat. That is set out in the Precious Metals Marking Regulations, and the Competition Bureau states it plainly: to carry a quality mark, gold items must have a minimum quality of 9K and a maximum quality of 24K. It is a genuinely useful fact when you are comparing pieces, because 9k is sold here legitimately and a lot of buyers have never encountered it. Here is what each karat actually contains, what the law requires of the stamp, and how to choose for the way you wear jewellery.
What Each Karat Contains
Karat measures the proportion of pure gold in an alloy, in twenty-fourths. The rest is other metals, chosen to add strength and colour. The Competition Bureau publishes the decimal designations permitted in Canada: 9K = .375, 10K = .416, 14K = .583, 18K = .750, 22K = .916.
| Karat | Canadian decimal mark | Gold content |
|---|---|---|
| 9K | .375 | 37.5% |
| 10K | .416 | 41.6% |
| 14K | .583 | 58.3% |
| 18K | .750 | 75.0% |
| 22K | .916 | 91.6% |
One detail causes real confusion when you shop across borders. Canada's regulation uses .583 for 14K, while European hallmarking uses 585, and Canada uses .416 for 10K against the 417 you will see elsewhere. Both are correct within their own legal system. The UK works in millesimal fineness entirely, and the Assay Office London lists the recognised gold finenesses as 375, 585, 750, 916 and 999. Do not mix the two systems in one comparison.
Marking Is Voluntary Here, and Truth Is Not
This surprises people. The Competition Bureau confirms that it is not mandatory to mark or advertise a precious metal article for quality, so an unstamped ring in a Canadian shop is not automatically suspect. What the law governs is what happens once a mark is applied: it must be truthful and applied as the legislation prescribes.
There is a second requirement most buyers have never heard of. Under section 4(3) of the Precious Metals Marking Act, where a quality mark is applied, a registered Canadian trademark, or one with an acceptable application filed, must be applied to the article as well. The Competition Bureau notes the exception: a Canadian trademark is required unless the item was hallmarked in accordance with the laws of the United Kingdom, or accurately quality marked according to the laws of another country.
So the practical check on a Canadian-marked piece is not just the karat number. It is whether a maker's mark sits beside it. A bare "14K" with no accompanying trademark on a domestically marked piece is a reasonable thing to ask about. Our guide to hallmarks, karat stamps and your rights in Canada covers what to look for.
The Tolerance Rule
Assay results are never perfectly exact, and solder dilutes the alloy, so the regulations allow a defined shortfall. Section 13 of the Precious Metals Marking Regulations sets it: the actual quality of the gold must not fall short of the represented quality by more than seven parts by weight in every 1,000 where solder is used, or three parts in every 1,000 where no solder is used. For white gold marked 18 karat or greater, the soldered allowance is 15 parts per 1,000.
This is why karat matters at the repair bench, not just at the till. A repair done with solder well below the piece's karat can push a stamped item outside those tolerances, which is worth raising when you drop a piece off.
Which Karat to Actually Buy
The common claim that lower karat is always harder-wearing is not as clean as it sounds, and we are not going to publish a hardness table, because we could not find a reliable metallurgical source that gives trustworthy figures by karat. Hardness in a gold alloy depends on which metals are used alongside the gold and on how the piece was worked and heat-treated, not on the karat number alone. The dealer tables circulating online contradict each other and some are internally inconsistent.
What is solid is the underlying chemistry. The Royal Society of Chemistry notes that gold is the most malleable of all metals and soft enough to be cut with a knife. Pure gold is far too soft for a ring. Alloying is what makes it wearable, and more alloy means more scope to engineer strength. That supports the general direction of the rule without justifying a precise ranking.
So we advise by use rather than by a number:
- 9K and 10K: the most affordable entry into solid gold, and legal to mark here. Lower gold content means a paler colour and, for some wearers, more chance of a reaction, because there is proportionally more of the other metals present. Worth knowing if you have a nickel sensitivity; see our guide to hypoallergenic jewellery.
- 14K: the practical default for engagement and wedding rings in Canada, and what most of our repair work comes in as. Good colour, sensible price, well understood by every bench.
- 18K: noticeably richer colour and a higher gold content that holds its value better. The usual choice when the colour of the metal is part of the point.
- 22K: beautiful deep colour, traditional in South Asian and Middle Eastern jewellery, and soft enough that it shows marks. Best in bangles, pendants and pieces that do not take daily knocks.
Our comparison of 14k and 18k for daily wear goes deeper on the two most common choices.
Gold Jewellery in the Shop
These are current pieces from our Coquitlam gold range.
Key Takeaways
- Canada's legal minimum for a gold quality mark is 9 karat, with a maximum of 24 karat.
- Quality marking is voluntary in Canada. Any mark applied must be truthful.
- A quality mark generally requires an accompanying Canadian trademark, with an exception for UK hallmarks and correct foreign marks.
- Canada uses .583 for 14K and .416 for 10K, which differ from the European 585 and 417.
- Hardness depends on the alloying metals and working, not on karat alone, so treat by-karat hardness tables with suspicion.
Frequently Asked Questions
What is the lowest karat that can legally be called gold in Canada?
Nine karat. The Precious Metals Marking Regulations set 9K as the minimum quality that may carry a gold quality mark in Canada, and the Competition Bureau states directly that gold items must have a minimum quality of 9K and a maximum of 24K to carry such a mark. This catches people out, because 9K is uncommon in North American retail while being entirely normal in the United Kingdom, where 375 is a recognised standard fineness. A 9K piece sold and marked in Canada is legitimate. It simply contains 37.5 percent gold, so expect a paler colour and a lower intrinsic metal value than the same piece in 14K or 18K, and price it accordingly.
Does an unmarked gold ring mean it is fake?
Not in Canada, where quality marking is voluntary. The Competition Bureau confirms it is not mandatory to mark or advertise a precious metal article for quality, so plenty of legitimate pieces carry no karat stamp at all, including handmade and older items. What the law regulates is the honesty of any mark that is applied. There is also a second requirement worth knowing: under the Precious Metals Marking Act, a quality mark generally must be accompanied by a registered Canadian trademark, unless the item was hallmarked under UK law or correctly marked under another country's law. If a domestically marked piece carries a bare karat number with no maker's mark beside it, that is a fair question to ask.
Is 18K gold softer and less durable than 14K?
The honest answer is more complicated than the usual rule suggests. Pure gold is genuinely very soft, and the Royal Society of Chemistry describes it as the most malleable of all metals, soft enough to be cut with a knife, so alloying is what makes gold wearable at all. But hardness in a finished alloy depends heavily on which metals are added and how the piece was worked and heat-treated, not on the karat number by itself. We looked for reliable published hardness figures by karat and could not find a trustworthy metallurgical source, with dealer tables contradicting one another. For a ring worn daily, 14K is the practical Canadian default. Choose 18K when the richer colour matters to you.
Why does my European gold say 585 when Canadian gold says .583?
Both describe 14 karat gold, and both are correct within their own legal system. Canada's Precious Metals Marking Regulations specify .583 as the permitted decimal designation for 14K, and .416 for 10K. European hallmarking works in millesimal fineness and uses 585 and 417 for the same alloys, and the Assay Office London lists the recognised gold finenesses as 375, 585, 750, 916 and 999. The tiny numerical gap reflects different rounding conventions in different regulations rather than a real difference in gold content. The one thing to avoid is mixing the two systems inside a single comparison table, which makes 14K look like two different products.
Sources
- Justice Laws Canada, Precious Metals Marking Regulations (C.R.C., c. 1303)
- Justice Laws Canada, Precious Metals Marking Act (R.S.C., 1985, c. P-19)
- Competition Bureau Canada, "Detailed requirements for marking of precious metals"
- Competition Bureau Canada, "Guide to the Precious Metals Marking Act and Regulations"
- Assay Office London, "What is a Hallmark?"
- Royal Society of Chemistry, Periodic Table: Gold
Regulatory figures retrieved August 2026. We did not publish hardness values by karat because no reliable metallurgical source could be verified. If something here is out of date by the time you're reading it, let us know, we keep our guides current as the trade changes.
Visit Vanhess
We work in 10K, 14K, 18K and 22K at our Coquitlam bench, and we will tell you which one suits how you actually wear a piece. See our gold buying guide, or call (604) 653-6449.
