Gold Karats Explained: 10K, 14K, 18K and 24K

Gold purity in the United States is stated in karats, written K or kt. Pure gold is 24 karat. Every karat below that means one twenty-fourth less gold and one twenty-fourth more of other metals, usually silver, copper, zinc or nickel, mixed in to make an alloy.

Karat	Gold content	Common stamp	Color	Hardness for daily wear
10K	10/24 = 41.7%	10K or 417	Paler yellow	Toughest of the four
14K	14/24 = 58.3%	14K or 585	Warm yellow	Tough, the US standard
18K	18/24 = 75%	18K or 750	Rich yellow	Softer, scratches more
24K	99.9% (practically pure)	24K or 999	Deep orange-yellow	Very soft, bends and dents

The three-digit stamps are the same idea in parts per thousand: 585 means 585 parts gold out of 1,000. Note that 14 divided by 24 is 58.3%, so the 585 stamp is slightly higher; makers stamp 585 to guarantee the alloy is at or above 14K.

10K has the least gold and the most alloy, which makes it the hardest and most scratch-resistant karat. For decades 10K was the lowest karat US rules allowed to be called gold; the FTC's 2018 update dropped that floor but still requires the karat to be disclosed. 10K is popular for heavy chains and men's rings because it holds up to daily wear and costs less per gram.

The trade-off is color and skin. 10K looks a little paler, and its higher share of other metals makes it more likely to bother sensitive skin. Every chain in our catalog is 10K, from the Miami Cuban Link Chain 1.50mm at $495 to the Rope Chain 5mm at $4,960, because heavy links that rub all day need the hardness. Browse them in gold chains or men's gold chains.

Each step up in karat trades strength for color. Here is how the four compare in daily life:

Karat	Scratches and dents	Color	Skin reactions	Typical use
10K	Least	Palest yellow	Most likely of the four	Heavy chains, men's rings, budget pieces
14K	Low	Warm yellow	Uncommon	Engagement rings, earrings, most fine jewelry
18K	More	Rich yellow	Rare	Luxury rings, watch cases, pendants
24K	Very soft	Deep orange-yellow	Very rare	Bullion, some cultural jewelry

Skin reactions come from the alloy metals, not the gold, so they drop as karat rises. People who react to 10K are often fine in 14K or 18K.

14K is the most common karat for fine jewelry in the United States. It balances color and strength: noticeably richer yellow than 10K, much harder than 18K. Most engagement rings and diamond earrings are 14K. Most of our rings are 14K, including house rings such as the Round Lab Diamond Ring 4.62 ct, 14K Yellow Gold at $2,800, and 97 of our 184 earrings are 14K. The full breakdown of what the number means is in what does 14K mean.

If pure gold is the most valuable, why mix it with anything? Because pure gold is soft enough to scratch with a fingernail and bend by hand. A 24K ring loses its shape, prongs open and let stones fall, chain links stretch and clasps wear out. Alloying fixes that. Adding copper, silver and zinc makes gold harder, springier and better at holding stones, and it lets jewelers control the color.

The trade-off is simple: every karat removed makes the piece tougher and paler and lowers the gold value per gram. Jewelers pick the karat that suits the job. A heavy Cuban link that rubs against itself all day needs hardness. A pair of earrings that barely touches anything can show off the richer color of a higher karat. That is the logic behind the "which karat for which piece" table further down this page.

18K is three-quarters gold. The color is deeper and the metal feels denser in the hand. Luxury watch cases and high-end European jewelry often use 18K. It scratches and bends more easily than 14K, so prongs and thin bands need more care. Most of our watches are listed in 18K, and two rings are 18K, including the Round Natural Diamond Ring, 18K White Gold at $6,000.

24K is as close to pure as gold gets, typically 99.9%. It is the form gold takes in bullion bars and coins. In jewelry it is too soft for most designs: a 24K chain stretches, links deform and clasps wear out quickly. It is more common in some Asian and Middle Eastern markets, where jewelry is also bought as a way to hold gold. For US-style chains and settings, 24K is rarely the right choice.

Karat is about how much gold is in the alloy. Color comes from what the rest is. The same 14K can be yellow, white or rose:

Color	What the alloy adds	Note
Yellow gold	Silver and copper	Closest to natural gold color
White gold	Palladium or nickel, often rhodium plated	Plating wears and can be redone
Rose gold	More copper	Warm pink tone, strong alloy

A 14K white gold ring and a 14K yellow gold ring contain the same share of gold. Many of our online pieces are offered in yellow, white and rose gold at the same price.

Karat is a percentage, so the same weight of jewelry holds very different amounts of pure gold depending on karat. Here is a 20 gram piece, about the weight of our 10K Cable Chain 3mm, in each karat:

Karat	Pure gold in 20 g	Other metals in 20 g
10K	8.3 g	11.7 g
14K	11.7 g	8.3 g
18K	15.0 g	5.0 g
24K	20.0 g	None to speak of

That is why the same chain design costs more in a higher karat: there is more gold in it. Higher-karat alloys are also denser, so a chain of the same dimensions weighs a little more in 18K than in 10K. The gold market then puts a daily dollar value on those grams, which is why gold jewelry prices move with the spot price.

The FTC's Jewelry Guides (16 CFR Part 23) cover how gold content may be described. A piece marked with a karat should contain that much gold, within tight tolerances: three parts per thousand for gold without solder and seven parts per thousand when the tested part contains solder. Sellers must disclose karat when they call something gold, and "gold" alone, with no karat, should only describe 24K.

The stamp is usually inside a ring band, on a chain's clasp or end tag, or on an earring post. Where to look and what the symbols mean is covered in carat vs karat, which also clears up the stone-weight unit that sounds the same.

Different markets settled on different everyday karats:

Market	Common jewelry karats
United States	10K and 14K, with 18K for luxury pieces
United Kingdom	9K, 18K and 22K, with official hallmarking
Continental Europe	14K (585) and 18K (750)
India and the Middle East	22K and higher

So a "low karat" piece in one country can be standard in another. A 22K chain bought abroad will look much yellower and feel softer than a US 10K or 14K chain of the same style.

Plated and filled jewelry sit outside the karat scale. A "14K gold plated" piece is base metal with a microscopic gold layer and should not be compared with solid 14K at all.

Piece	Best karat	Why
Heavy Cuban or rope chain	10K or 14K	Links rub all day; hardness matters more than color
Thin chain under 2 mm	10K or 14K	Thin links stretch in soft gold
Engagement ring	14K	Holds prongs tight, good color
Men's ring worn while working	10K or 14K	Resists dents and scratches
Earrings and pendants	14K or 18K	Little wear, color matters more
Sensitive skin	14K or 18K	Less alloy metal touching skin

The head-to-head decision for most buyers is between 10K and 14K; 10K vs 14K gold covers it. For the chains themselves, start with gold Cuban link chains or gold pendants, and keep any karat bright with how to clean a gold chain.

1. How hard will the piece be worn? Daily, rubbing, at work or the gym: 10K or 14K. Occasional or low-contact: 14K or 18K.
2. Does your skin react to jewelry? If cheap metals or 10K leave marks or itching, choose 14K or 18K, and ask about nickel in white gold.
3. What matters more, color or budget? Higher karat gives a richer yellow at a higher price per gram. On heavy chains the difference is large; on light pieces it is small.

Most buyers land on 14K for rings and earrings and on 10K or 14K for chains. There is no wrong answer as long as the karat is stamped, stated on the receipt and matched to how the piece will be worn.

Karat tells you how much of a piece is gold, and therefore how it will wear, what color it shows and what the metal is worth. Check the stamp, match the karat to how hard the piece will be worn, and make sure the receipt states it.