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Combien vaut une chaîne en or 18 carats ? Guide des prix des chaînes en or

on May 01, 2024

Gold necklaces have always been an inherent part of both casual and formal attire. While there are different types of gold chains available on the market (10K, 14K, etc.), 18K gold is one of the highest-quality options, offering exceptional strength, durability, and a luxurious look.

Whether you’re buying an 18K gold chain or selling your own, understanding how karat weight works and what factors to consider when determining the price is key to making a reasonable decision.

Knowing how much an 18K gold chain is worth will allow you to avoid getting scammed when buying a chain or accepting an offer that is way below its market value when selling one.

In this guide, you’ll learn more about the purity and characteristics of 18K gold. We’ve also compiled a list of some crucial factors that determine the value of an 18K gold chain. If you’ve decided to get yourself a gold chain, you can find a couple of top-quality 18K gold necklaces from IceCartel’s exquisite chain collection. 

What Is 18K Gold

Gold karat weight refers to the purity of a gold alloy, which is made up of pure gold and a range of other metals.

An 18K gold alloy has a 75% purity, meaning that 75% of its total weight is pure gold while the remaining 25% is made of metals, such as silver, zinc, copper, nickel, iron, aluminum, platinum, and more.

Due to its purity and composition, 18K gold is ideal for crafting durable pieces of jewelry that can withstand everyday wear and tear. Although 18K gold is resistant to most chemicals, it’s still softer than 10K and 14K gold alloys, meaning that it can be easily scratched and damaged if not handled with care.

Besides, 18K gold has a richer and more saturated color than gold alloys with a lower purity. This is due to the higher percentage of pure gold in the 18K gold alloy. 

Determining the Value of an 18K Gold Chain

So, how much is an 18K gold chain worth?

Determining the value of an 18K gold chain is a multi-step process, which involves considering a few crucial factors that are discussed in detail below. 

how much is 18k gold necklace worth

Market Price of 18K Gold

When selling or buying a gold chain, calculating the market value of your jewelry is one of the most important steps. By looking at the live gold price chart, you can find the current market price of gold, which indicates the price per gram, kilogram, or ounce of pure 24K gold.

Note that gold prices fluctuate constantly, so the value of your 18K gold chain heavily relies on this. 

18K Gold Purity

Considering the purity of a gold chain is particularly crucial when establishing its price. As 18K gold is made of 75% pure gold, you’ll need to determine the market price based on its purity.

18K gold chains are considered to be one of the highest-purity options available on the market, therefore, the price is higher when compared to 10K and 14K gold chains. You should expect an 18K gold chain to cost 20-40% more than those made of lower-karat gold alloys.

Now, we’ll need to do some maths to find how much an 18K gold chain is worth.

To calculate the amount of pure gold in an 18K gold chain, you should multiply the total weight of the chain by 75% and divide it by 100%. Then, you can calculate the market price of your gold chain by multiplying the current market price of 1 gram of 24K gold by the amount of pure gold present in your 18K gold chain.

First, weigh your 18K gold chain. Let’s say it weighs 30 grams. We know that 75% of its total weight is pure 24K gold, so the amount of pure gold will be 22.5 grams. If the current market price of pure gold is $75, the market price of your gold chain will be $1,687.5.

Note that the design and resale value of the chain have been ignored here. 

Total Weight of the Chain

Undoubtedly, the weight of an 18K gold chain affects its overall price. Generally speaking, heavier gold chains are more expensive than lightweight options.

However, slim gold chains with delicate details may require more effort and expertise, which increases the price.

All things considered, heavier 18K gold chains are more expensive, but more lightweight options can cost the same when featuring unique designs and intricate details. 

Chain Design Complexity

18 k gold worth

In most cases, plain gold chains are less expensive than those featuring a distinctive design with complex attributes.

In 18K gold chains, we often see intricate details that make the chain stand out while increasing its overall value.

Along with its high level of purity, 18K gold is noticeably softer than lower-karat gold alloys, meaning that it can be easily bent and molded into different shapes and embellishments. 

Jeweler’s or Brand Reputation

The reputation of a jeweler or brand will also affect the price of an 18K gold chain. When buying a gold chain from a reputable and trustworthy jeweler, you should expect to pay more for the quality of work and reliability.

Contrarily, jewelers with less experience usually offer more affordable prices. However, gold chains from such jewelers may have a significantly lower quality.

When it comes to luxury brands, their 18K gold chains are way more expensive than those crafted by local jewelers. Still, these chains may feature exclusive designs and meticulous craftsmanship, making them worth the investment. 

Resale Value

Buying 18K gold chains is an investment. Therefore, considering the resale value of a gold chain is key to determining its price.

18K gold chains that have a high resale value also cost more, whereas gold necklaces with a low resale value are more on the cheaper side.

The resale value of gold chains is particularly relevant when selling pre-owned jewelry. While used jewelry is less expensive than brand-new options, rare and highly desirable gold chains typically fetch a higher price due to having a higher resale value. 

Chain Condition

If you’ve decided to buy or sell a pre-owned 18K gold chain, you’ll need to check its condition before determining the price.

Pre-owned gold chains that are in flawless condition can be sold for about 90-95% of the original price.

Used gold chains with minor marks and scratches have a market value of approximately 80% of the original price.

In the case of gold chains with major signs of wear and tear, the price will most likely be determined based on its weight and gold purity, which is 75% for 18K gold. 

Presence of Gemstones

Any precious and semi-precious gemstones will increase the price of an 18K gold chain. While some chains are iced out with natural or lab-grown diamonds, others feature moissanite crystals. You may also find some unique gold chains with natural gemstones, such as sapphires, emeralds, rubies, and more. 

Buy Gold Chains from IceCartel

IceCartel offers a wide selection of gold chains, in various color and material options. Whether you want to get an affordable chain made of 925 sterling silver and 14K gold plating or you prefer investing in a solid 14K or 18K gold chain, you can easily find the suitable design for you.

The best part is that IceCartel offers a custom chain-making service, enabling you to customize gold chains and other pieces of jewelry to your liking. That being said, you can select 18K gold as the primary material for any type of chain.

Here are some of the most eye-catching 14K gold chains from IceCartel’s exquisite gold chain collection that are also available in 18K gold and sterling silver options.


Whether you’re selling or buying gold jewelry, knowing how to determine its value is crucial. When it comes to 18K gold chains, understanding the purity of 18K gold and considering the market value of 18K gold chains is essential.

18K gold is a high-purity alloy (75% pure gold) and gold chains made of 18K gold are more expensive than those crafted with lower-purity materials (10K or 14K gold). However, there are a few factors to keep in mind to accurately evaluate the price.

The main aspects you should consider when determining the price of an 18K gold chain include the current market price of pure gold, the purity of your gold chain, its total weight, the overall chain design, the jeweler’s or brand reputation, its resale value, chain condition, and the presence of precious gemstones. 

Author Joosep Seitam

Joosep Seitam

Joosep est né à Tallinn, en Estonie, un petit pays d'Europe du Nord. Il est entrepreneur et l'un des cofondateurs d'Icecartel. Joosep travaille dans le secteur de la bijouterie depuis 2019, année où il a créé la marque à partir de zéro. Au cours de ces années, Joosep a appris tout ce qu'il y a à savoir sur l'industrie de la bijouterie et il est ici pour partager tout cela !

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