14 Karat or 18 Karat Gold: What Is the Difference?

When buying a piece of jewelry, or estimating the value of what you already own, the same question often arises: is 14 karat or 18 karat gold better? Both are real gold, but they do not contain the same amount of pure gold. This difference affects their color, strength, price and value. Here is what you need to know to compare them.

Karat measures the proportion of pure gold on a scale of 24.

At equal weight, an 18 karat gold piece of jewelry therefore contains approximately 28% more pure gold than a 14 karat gold piece.

The more pure gold an alloy contains, the more intense its yellow color. 18 karat gold has a warm, luminous shade that is highly appreciated in fine jewelry. 14 karat gold is slightly paler.

For white and rose gold, the difference is less visible: the color mainly depends on the metals added to the alloy and, for white gold, on the coating (often rhodium).

Pure gold is a soft metal that scratches and deforms easily. Added metals make it more resistant. 14 karat gold, which contains more of these metals, therefore withstands everyday scratches and knocks slightly better.

That is why 14 karat gold is often chosen for everyday jewelry, such as wedding bands or bracelets. It is the most common choice in the United States, while 18K is widely used in Europe and 22K–24K is popular in parts of Asia and the Middle East.

At equal weight and with the same craftsmanship, a 14 karat gold piece generally costs less than an 18 karat gold piece because it contains less gold. However, the retail price also depends on craftsmanship, design, brand and stones: an elaborate 14 karat piece can cost more than a simple 18 karat piece.

Metal value uses the same formula for both:

Metal value = weight (in grams) × fineness ÷ 1,000 × pure gold price per gram

Take two rings weighing 10 grams each and a hypothetical price of $100 per gram of pure gold (this figure is only an example):

At equal weight, the 18 karat gold ring therefore has a higher metal value. For a calculation using real prices, updated throughout the day, use our gold calculator. For the detailed method, read our guide to the 18 karat gold price per gram.

When buying gold, professionals mainly base their assessment on the amount of pure gold contained in the object. An 18 karat gold piece will therefore generally receive a higher valuation than a 14 karat piece of the same weight. In both cases, the offered buyback price is often lower than the metal value because it includes melting and refining costs and the buyer's margin.

For the best selling conditions, read our tips on selling your gold.

Look at the hallmarks, the small marks engraved on the jewelry, often inside a ring or near the clasp:

In France, each gold fineness is guaranteed by a specific official hallmark: 18 karat gold bears an eagle's head, the French hallmark. To recognize other hallmarks, see our hallmark guide. If in doubt, have a jeweler or assayer check the piece.

The right choice therefore depends on your use, budget and tastes.

Examples use US dollars. The formulas work in any currency, provided purchase costs, metal quotes, and sale proceeds use the same currency. Metalstat lets you display values in USD, EUR, MAD, GBP, or CHF; not every currency is available in the app.

Gold prices are often quoted per troy ounce. One troy ounce is approximately 31.1035 g: divide the price per troy ounce by 31.1035 to obtain the price per gram, then apply fineness and quantity. Do not use an ordinary ounce.

Gold purity is expressed in karats (K). 14K is common in the United States, 18K is widely used in Europe, and 22K–24K is popular in parts of Asia and the Middle East; practices vary by market and product. International marks include “750” or “18K” and “585” or “14K”. An eagle's head is a French hallmark example, not a worldwide requirement, and a mark alone does not prove authenticity.

Tax, identification, payment, and selling rules vary by country and, in the United States, by state. Check with your local tax administration and other relevant authorities, or consult a qualified local professional. Do not assume a rule from another country applies to your sale.

Is 14 karat gold real gold? Yes. 14 karat gold contains 58.5% pure gold. It is real gold, simply alloyed with a greater proportion of other metals.

Does 14 karat gold darken? Gold does not oxidize, but the other metals in the alloy may tarnish slightly over time or on contact with certain products. Gentle cleaning is generally enough to restore its shine.

How much is 1 gram of 14 karat gold worth? One gram of 14 karat gold contains 0.585 grams of pure gold. Its metal value therefore equals 58.5% of the pure gold price per gram. With a hypothetical price of $100 per gram, this gives a metal value of $58.50.

Can you be allergic to 14 karat gold? Reactions are generally related to the other metals in the alloy rather than the gold itself. If you have sensitive skin, ask the jeweler for the exact alloy composition.

Should you prefer 18 karat gold for investing? Jewelry is not the most direct way to invest in gold because its purchase price includes craftsmanship and the jeweler's margin. Its metal value depends on the amount of pure gold it contains. This article does not constitute investment advice.

14 karat gold contains 58.5% pure gold: it is stronger and more affordable. 18 karat gold contains 75%: its color is richer and its metal value higher at equal weight. To track the value of your jewelry, whatever its fineness, record it in Metalstat: it calculates its indicative metal value using real prices, updated throughout the day.