Why do diamond rings use 18k gold?

Many people have probably heard the term "18K gold" at jewelry stores. Some may wonder what 18K gold is and how it differs from the gold found at traditional gold shops. Let's find out.

The purity of gold is measured in units called "Karat." Therefore, when abbreviated—such as 18K gold or 14K gold—a higher number indicates a higher percentage of gold and greater softness. The percentages are as follows:

24K gold is 99.99% pure gold.

23.16K gold is 96.50% pure gold.

22K gold is 91.70% pure gold.

21K gold is 87.50% pure gold.

18K gold is 75% pure gold. (This is the most popular, as 18K gold is the international standard.)

14K gold is 58.30% pure gold.

9K gold is 37.50% pure gold.

Why 18K Gold?

Most diamond jewelry is crafted using 18K gold because it is mixed with other materials to provide the durability needed for daily wear. It allows for precise shaping and ensures that the prongs holding the diamonds are strong and resistant to deformation from impact.

18K gold contains 75% pure gold mixed with other metals such as silver, copper, and zinc to increase strength. It is precisely these mixtures that create variations like white gold and rose gold.

What happens if the gold is lower than 18K?

Gold lower than 18K contains a higher proportion of other metals, which makes the setting harder. Over the long term, it may become dull, unlike 18K gold, which maintains its luster.

However, for those on a budget, pieces lower than 18K are still an interesting option.

Now that we understand why jewelry stores prefer 18K gold, all that remains is to choose the color that best suits your preference, lifestyle, and usage.