By Gado Jewellers | Published July 7, 2026 | 7 min read
10K vs 14K vs 18K vs 22K Gold: A Purity Guide, and Why Gado Chooses 18K
Two rings can look identical in a photograph and yet be very different. The difference is often the gold, and specifically, how much of it is actually gold. Karats are the measure that tells you exactly that, making it the single most useful thing to understand before buying anything made of gold.
This guide explains the differences between 10K, 14K, 18K, and 22K gold: how they compare on colour, durability, and value, and why Gado works in solid 18K and treats it as the standard rather than an upgrade option.
Gold purity is measured in karats out of 24.
- 10K gold is 41.7% pure,
- 14K is 58.3%,
- 18K is 75%,
- and 22K is 91.6%.
Higher karats mean richer colour and greater value but softer metal. 18K gold, at 75% purity, is the standard for fine jewelry because it balances rich tone and lasting value with the neccesary durability to be worn every day.
What karats actually measure
Pure gold is 24 karats. Since pure gold is too soft to hold a setting or survive daily wear, it is mixed with other metals, called alloys, that give a jewelry piece it's strength.
The karat number tells you how much of the final metal is pure gold, out of 24. So 18K is 18 parts gold to 6 parts alloy, or 75% pure. That is the whole system.
Everything else, colour, durability, value, price, follows from that one ratio.
The four karats compared
10K gold, 41.7% pure
This is the minimum purity that can legally be called gold in North America. Less than half pure gold, heavily alloyed, which makes it hard and inexpensive but paler in colour and quicker to tarnish. Common in budget and mass-market jewelry.
14K gold, 58.3% pure
A common choice in North America; it's a little bit more than half gold, allowing it to balance gold content against cost. This purity level is widely used in mid-tier fine jewelry. It's more durable than higher karats but the tradeoff is it comes with a less saturated tone and more alloy, meaning slightly higher tarnish risk over time.
18K gold, 75% pure
The luxury standard. Three-quarters pure gold, with a rich, warm tone and far less tarnish risk than lower karats, yet still strong enough for everyday wear. It is the karat chosen by the world's most established fine jewelry houses for exactly this reason. This is Gado's standard.
22K gold, 91.6% pure
Very high purity, with a deep, striking yellow. Prized in cultural and ceremonial jewelry, such as traditional wedding sets. At over 90% pure gold, it is inevitably more soft, making it prone to bending and scratching; making it impractical for gemstone settings and daily-wear pieces.
Colour: why higher karat colours look richer
The more pure gold in the metal, the deeper and warmer the yellow. 10K and 14K read paler because more of the metal is alloy. 18K gives that glowing, saturated warmth people picture when they think of gold, without crossing into the softness of 22K.
If the colour of gold matters to you, karat is the lever that controls it.
Durability: the trade-off that needs an explaination
Higher purity does not mean more durable: it is, in fact, the opposite. The alloys that dilute purity are what add hardness, so lower-karat gold is technically harder.
But hardness is not the whole story: lower karats carry more non-gold metal, which raises tarnish risk over time. 18K sits at the point where the metal is pure enough to resist tarnish and stay rich in colour, and alloyed enough to hold prongs, bezels, and gemstones securely for a lifetime.
That balance is the entire reason it is the fine-jewelry standard.
Value that stays with the piece
Gold holds intrinsic value, and the more pure gold a piece contains, the more of that value it carries. An 18K piece holds meaningfully more gold than a 14K or 10K piece of the same weight, which means it retains worth in a way lower karats cannot match. For jewelry meant to last generations, that matters. You are not just buying a look, you are buying the gold itself.
Why Gado chooses 18K, always
At Gado, 18K is the standard, not a premium tier you pay extra to reach. Every piece is crafted in solid 18K gold (750) and backed by a lifetime guarantee. Solid, not plated, not filled. That distinction is the one that determines whether a piece lasts a season or a lifetime.
The reason is both aesthetic and technical. 18K gives the rich, warm tone that lower karats cannot, with far less tarnish risk, while remaining dense and workable enough to sculpt refined prongs, bezels, and galleries that hold a gemstone properly over decades. For emerald settings in particular, where the metal has to protect a more delicate stone, that combination of richness and structural integrity is exactly what is needed. Lower karats compromise on tone; higher karats compromise on strength. 18K compromises on neither, which is why the world's iconic houses and Gado both choose it.
It is also a question of honesty. We do not pad a margin with plating or lower-karat metal dressed up as fine jewelry. What you buy is solid 18K, certified for purity, priced directly without the retail markup layered on top. Same gold the major houses use, one fewer middleman between the source and your hand.
Choosing your karat
If you want the richest tone and lasting value in a piece you will wear for years, 18K is the answer, and it is why it is our standard. 14K is a reasonable middle choice if initial cost is the priority over tone and gold content. 10K makes sense mainly for budget pieces. 22K is best kept to ceremonial jewelry that will not take daily knocks. For fine jewelry meant to be worn and kept, 18K is where it begins.
Explore how solid 18K comes to life across our gold chains, engagement rings, and the full collection.
Frequently asked questions
What does 18K gold mean?
18K gold is 75% pure gold, mixed with 25% other metals for strength. It is the standard for fine jewelry because it balances rich colour and lasting value with enough durability for everyday wear.
Is 18K or 14K gold better?
Neither is universally better, but they serve different priorities. 18K has a richer tone, more pure gold content, and less tarnish risk, while 14K is harder and lower in cost. For fine jewelry meant to last, 18K is the standard.
Is 18K gold good for everyday wear?
Yes. At 75% purity, 18K gold is durable enough for daily wear while resisting the tarnish that affects lower karats. Solid 18K, as opposed to plated or filled, is well suited to pieces worn every day.
Why is higher karat gold softer?
Pure gold is naturally soft. The alloys mixed in to lower the karat are what add hardness, so higher-karat gold, with less alloy, is softer. This is why 22K is more delicate than 18K or 14K.
Does 18K gold tarnish?
18K gold has a low tarnish risk because it is 75% pure, with far less of the reactive alloy metals that cause tarnishing in lower karats. With basic care it keeps its colour for generations.
What is the difference between solid gold and gold plated?
Solid gold is the same karat all the way through. Gold plated is a thin layer of gold over a base metal, which wears off over time. Gado uses only solid 18K gold, never plated or filled.
