What Does Gold Karat Mean? 10K, 14K, 18K & 24K Plus the 585 and 750 Stamps Explained

Flip over a ring or check the clasp of a chain and you will often find a tiny stamp such as 14K, 750 or 585. It looks like a code, and in a way it is. Many people wear or inherit gold for years without knowing what those numbers say about the metal. Understanding the gold karat meaning helps you judge quality, compare prices and avoid overpaying. This guide compares 10K, 14K, 18K and 24K gold, decodes the 585 and 750 stamps, and includes a full gold purity chart. You will be able to read almost any hallmark on your jewellery.

What Is a Gold Karat?

Pure gold is very soft, so jewellers rarely use it on its own. Instead, they melt it with other metals such as copper, silver, nickel or zinc. This process, called alloying, adds strength for daily wear, shifts the colour toward yellow, white or rose, and lowers the cost. The karat number tells you what share of the final alloy is gold. To work out the percentage, divide the karat by 24 and multiply by 100. For example, 18 ÷ 24 × 100 gives 75% gold, and the other 25% is other metals. Gold purity is also called fineness, a term you will meet again below.

Karat vs. Carat, What’s the Difference?

Karat and carat sound alike but measure different things. Karat, spelled with a K, describes gold purity. Carat, spelled with a C, is a unit of weight for gemstones, where one carat equals 0.2 grams. A one-carat diamond can sit in a 14-karat gold ring, and the two numbers are unrelated.

10K vs 14K vs 18K vs 24K Gold Compared

The difference between 10K, 14K, 18K and 24K gold comes down to how much pure gold each contains: the higher the karat, the richer the colour, the softer the metal and the higher the price.

24K Gold 999 / Pure Gold

Pure gold is 99.9% gold and carries the 999 stamp. It has a deep, rich yellow colour, but it is very soft and dents or scratches easily. That makes it better suited to bullion bars, coins and ceremonial pieces than to everyday rings. It sits at the top of the price range per gram, since almost all of the weight is gold. If you do wear it, expect to treat it gently.

18K Gold (750)

18K gold is 75% gold and is stamped 750. It offers a warm, saturated colour and feels luxurious, yet the added metals give it reasonable strength. It is a favourite for fine jewellery, engagement rings and premium watches, and it comes in yellow, white and rose shades. It scratches more easily than lower karats, but many people accept that for the richer look. Expect a high price, second only to pure gold.

14K Gold (585)

14K gold is 58.5% gold and carries the 585 stamp. It strikes the best balance for most buyers: tougher than 18K, still clearly gold in colour, and noticeably cheaper. It resists scratches and bending far better than 24K. It suits engagement rings, wedding bands, chains and daily wear, which explains why it is so common in North America. Its mid-range price makes it a practical pick for pieces worn often.

10K Gold (417)

10K gold is 41.7% gold and is stamped 417. It is generally the hardest and most affordable of the four, so it stands up well to knocks and heavy use. The colour is a little paler and can look slightly less rich than higher karats. It is common in school rings, budget-friendly chains and everyday pieces. Because it holds more alloy metals, a few people with sensitive skin react to it.

What Do the 585 and 750 Stamps Mean?

The 585 and 750 stamps use millesimal fineness, a system that counts parts of pure gold per 1,000 instead of per 24. The word millesimal simply means “per thousand”. It is standard across Europe and appears on many imported pieces. Canada’s Competition Bureau has updated its guidance so that numeric quality marks can be written in parts per thousand, without a decimal point, so you may see these numbers on jewellery sold here. You can read the rules in the Bureau’s guide to the Precious Metals Marking Act and Regulations. canada

What Does 585 Gold Mean?

A 585 stamp means the item contains 585 parts of pure gold in every 1,000, or 58.5% gold. That matches 14K gold, since 14 divided by 24 is roughly 58.3% and the fineness standard sets the mark at 58.5%. So yes, it is real gold, not plating, as long as the stamp is genuine. The remaining 41.5% is made up of alloy metals such as copper and silver. You will often see 585 on European chains, watches and wedding bands.

What Does 750 Gold Mean?

A 750 stamp means 750 parts of pure gold per 1,000, which is 75% gold. It is the same as 18K gold, because 18 divided by 24 equals exactly 0.75. The other 25% is a mix of metals such as copper, silver or palladium, and the blend decides whether the piece looks yellow, rose or white. Because 750 gold is richer than 585, it looks warmer and costs more, though it scratches a little more easily.

You may also come across 375 (9K, or 37.5% gold), 417 (10K), 916 (22K, or 91.6% gold) and 999 (24K). Use these with the chart below to decode almost any gold mark.

Gold Karat Purity Chart

Read the chart from left to right. Find the number on your piece, then match it to the karat, percentage and typical use. A stamp with a K, such as 14K, uses the karat system, while a three-digit number, such as 585, uses fineness. If a piece shows both, they should agree. A mismatch, such as 18K beside 585, is a warning sign worth having checked. Remember that a stamp only shows the claimed purity, so the maker’s mark beside it matters too.

Which Gold Karat Should You Choose?

For Engagement & Wedding Rings

For rings worn daily, 14K and 18K are the usual choices. 14K is tougher and more affordable, which helps keep a diamond’s prongs secure. 18K offers a richer colour and suits buyers who accept a few more surface scratches for a premium look. Pure 24K is rarely used for settings because it bends too easily to hold a stone safely.

For Everyday Jewellery & Sensitive Skin

For daily wear, 10K and 14K resist scratches and bending best. If metal irritates your skin, the trigger is usually nickel in the alloy, not the gold. Higher karats carry less alloy, so 18K is often gentler, and some jewellers offer nickel-free white gold made with palladium. Ask which metals are in the mix before buying.

For Investment & Resale Value

For investment, 24K bars and coins are the standard because their value follows the market price of gold closely and their purity is easy to verify. Jewellery is different. Resale value usually reflects the gold weight and karat, and you rarely recover the retail markup or design premium. Higher karats hold more gold per gram, and keeping receipts and certificates helps a buyer or refiner trust the piece.

How to Find and Read the Karat Stamp on Your Gold

• Hallmarks are tiny, so check discreet spots. On rings, look inside the band. On chains and bracelets, look near the clasp or on the small tag beside it. Earrings often carry a stamp on the post or back. A magnifying glass or your phone’s camera zoom helps. Beside the karat or fineness number you may see a maker’s mark. In Canada, a quality mark is normally accompanied by a Canadian trademark, unless the item was hallmarked under United Kingdom law or accurately marked under another country’s laws. 
• If there is no stamp, or years of wear have erased it, do not assume the piece is fake, since some older, handmade and imported items are unmarked. Take it to a certified jeweller or gemologist, who can test purity with acid, an electronic tester or X-ray fluorescence (XRF), a scan that measures metal content without damaging the item.

Conclusion

Now you know the gold karat meaning: it is a purity score out of 24, so a higher number means more pure gold. The 585 stamp equals 14K, 750 equals 18K, and 999 marks near-pure 24K. Just remember the trade-off. More gold brings a richer colour and a higher price, but also a softer metal that scratches sooner. Before you buy or sell, match the karat to how the piece will be used, whether that is a tough 14K ring for daily wear or a 24K bar for saving. Check the stamp, then ask questions.