Jewelry

The Different Karats of Gold: 10K, 14K, 18K, and 24K

Unsure about which karat of gold to look for when purchasing jewelry? Our ultimate guide to the different karats of gold is here to help. 

By 

Meyme Nakash

 |  August 26, 2025

Not all gold is created equal, especially when it comes to the different karats of gold. Whether you’re shopping for a statement piece or everyday jewelry, understanding the benefits and drawbacks of 10K, 14K, 18K, and 24K gold is essential to selecting a piece that suits your style, your budget, and how you intend to wear it. Each karat of gold is primarily distinguished by color, durability, and value. Here, we answer the most common questions first-time gold jewelry buyers ask relating to karats, then break down the key differences between the types of karats. 

• What Is a Karat?
• Karat Gold Stamps and Markings
• What Causes Color Differences in Gold? 
• What’s the Difference Between 10K, 14K, 18K, and 24K Gold?
• What Karat Gold Is the Best?

The Different Karats of Gold

Knowing the difference between the various types of gold is the first step in purchasing jewelry with confidence. Read more tips in this ultimate guide on how to purchase jewelry. 

What Is a Karat?

A karat is a unit of measurement that expresses the purity of gold of an item. The term karat (not to be confused with carat, which measures the weight of diamonds) comes from the word kerátion, or “carob seed” in ancient Greek. Before the advent of modern scales, people commonly used carob seeds to weigh gold and gemstones due to their consistently uniform weight. Over time, karats evolved to represent gold purity, rather than weight. 

This shift came about during the Roman Empire, when Emperor Constantine introduced the solidus, a coin that weighed 4.5 grams and was made of pure gold. The solidus became the standard to compare the purity of other coins against, giving rise to the tradition of dividing gold purity into 24 parts. In this fractional system for assessing alloyed gold, a piece that is 14 parts gold is therefore eight parts alloy, making it 18K gold, for example. Today, karats remain the predominant system for measuring gold purity. 

Read More: Carats vs. Karats: What’s the Difference?

Karat Gold Stamps and Markings

Gold stamps and markings help verify the authenticity and purity of a gold item. All contemporary jewelry pieces are legally required to have a karat stamp, such as 14K and 18K, or a millésimal fineness mark (a three-digit number corresponding to the different karats), like 750. Unlike the karat system, which is measured using 24 parts, the millésimal fineness scale measures how many parts out of 1,000 are pure gold in a piece. For instance, if a piece of jewelry contains a 750 marking, this means it’s 750 parts gold and 250 parts other metals, indicating it’s 18K gold. 

If a piece of gold jewelry lacks identifying marks, this doesn’t necessarily mean it’s not gold. Vintage and estate jewelry might have worn-down markings or none at all, if they preceded the legal requirement that gold must be stamped with its karat weight. If you want to confirm the gold content of an unstamped piece, some methods include a jeweler’s acid test, XRF scan, and fire assay.

What Causes Color Differences in Gold? 

Pure gold is naturally yellow, so the higher the karat, the richer and warmer the yellow. The color of gold also depends on the metals that jewelers mix it with. 

Rose gold gets its pinkish color from copper, a reddish material that blends beautifully with gold. Therefore, an 18K rose gold necklace, for instance, might contain 75% gold, 22.5% copper, and 2.5% silver (to soften the reddish hue of copper). Since copper is a hard metal, it will strengthen the piece, in addition to giving it a lovely blush tone. Of course, not all rose gold has the same hue, and a piece of rose gold jewelry will be more or less pink depending on the amount of copper in the alloy.

As for white gold, its silvery-white appearance is the result of alloying pure gold with white-tone metals such as nickel, palladium, silver, or zinc. These metals lighten gold’s natural yellow color. Many jewelry brands and manufacturers will plate a piece with a thin layer of rhodium, a rare white metal from the platinum family, to hide any potential yellow undertones of a white gold alloy. 

What’s the Difference Between 10K, 14K, 18K, and 24K Gold?

The difference between 10K, 14K, 18K, and 24K lies in their gold purity, which affects everything from color and value to durability. Below, we break down the key differences among the types of karats. 

10K Gold

10K gold is 41.7% pure gold and 58.3% alloy metals. It has a pale yellow color because the majority of its composition is other metals, diluting the gold’s lustrous yellow hue. It’s affordable but has a higher risk of tarnishing and causing skin reactions, compared with higher karats of gold. For this reason, La Patiala strongly recommends against purchasing jewelry that uses less than 14K gold.  

14K Gold

Brands typically use 14K gold, a blend of 58.3% pure gold and 41.7% alloy metals, for everyday fine jewelry because it contains a higher percentage of alloy metals (but significantly lower than in 10K gold), making it more durable and resistant to scratching than higher-karat gold. This comes at a cost, however, as 14K yellow gold is duller in color when compared with higher-karat gold, due to its higher percentage of other metals. We recommend 14K gold jewelry for those who have active lifestyles or who don’t mind a paler yellow color. This karat gold is also more affordable than 18K gold (read more below), which is a selling point for some. 

18K Gold

18K gold is 75% pure gold and 25% alloy metals. Thanks to its superior gold content, 18K gold is more hypoallergenic than lower-karat golds, significantly decreasing the chances of skin irritation. It retains the rich yellow color of pure gold without being as soft and malleable as 24K gold (which we discuss in the next section), explaining why top jewelers often use it in luxury pieces. This type of gold is more expensive than lower-karat gold and has great investment value. Though durable enough to wear every day, 18K gold is softer than 14K gold and is therefore more likely to scratch if mishandled. Of course, this can be mitigated by taking proper care of your 18K jewelry. Some suggested methods include cleaning it with mild soap and a soft cloth, and storing it in a fabric-lined box or case. 

24K Gold

Showcasing an intense, warm yellow, 24K gold is 99.9% pure gold (the other 0.1% accounts for any naturally occurring trace impurities). It has the highest value of all karat golds because it doesn’t contain any other metals. Pure gold is soft and malleable, making it impractical for everyday jewelry. This is why in Indian and Middle Eastern cultures, which value 24K gold jewelry, individuals reserve these pieces for ceremonial purposes and only occasional wear. Collectors favor the soft material due to its stunning appearance and excellent investment value, and because they’re less likely to wear the piece, they can enjoy 24K jewelry without worrying about potential damage.

Some brands, including Gurhan and Coomi, use 22K gold in their collections, which is 91.6% gold and 8.4% alloy metals, which is slightly more durable than 24K gold, but still susceptible to damage if overworn or misused. Jewelers love it for its rich hue. 

What Karat Gold Is the Best? 

In the industry, 18K gold is the standard for fine and high jewelry, thanks to its perfect balance between aesthetics and practicality. Unlike 24K gold, which is too soft for regular wear, 18K gold has enough hardness to resist bending, denting, or heavy scratching while still maintaining the luster of gold. What’s more, jewelers favor 18K gold because it’s sturdy enough to set gemstones in and hold intricate designs over time. Thanks to its higher percentage of gold — which doesn’t oxidize — it’s less prone to tarnishing compared with lower-karat golds, such as 14K or 10K. Its higher gold content also means it is unlikely to cause skin irritation, making it the ideal choice for those who have sensitive skin. Therefore, whether you’re looking for an heirloom-worthy necklace or a timeless ring, 18K gold offers the elegance and lasting strength to make your purchase as practical as it is luxurious.

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