What is 9 Carat Gold? Composition, Advantages, and Legislation
What is 9 karat gold?
9 karat gold is a gold alloy consisting of 37.5% pure gold and 62.5% other metals such as silver, copper, or zinc. The term "karat" refers to the percentage of pure gold in an alloy — pure gold is 24 karat (100%). 9 karat gold is more affordable and durable than higher karat gold but contains less pure gold. In the Netherlands, specific legal regulations apply to the sale of 9 karat gold. Check out our jewelry collection for all material options.
Composition of 9 karat gold
9 karat gold consists of 9 parts pure gold and 15 parts other metals — which translates to 37.5% pure gold and 62.5% other metals. The added metals make the gold stronger and harder because pure gold is naturally very soft and can easily bend or scratch. Depending on the added metals, 9 karat gold can have a yellow, rose, or white gold color: copper gives a reddish hue, silver a paler white gold color.
Advantages of 9 karat gold
Durability — 9 karat gold is harder and more wear-resistant than higher karat gold such as 18 or 24 karat. Ideal for jewelry worn daily. Affordability — due to its lower gold content, 9 karat gold is significantly cheaper than higher karat gold types. Versatility — available in yellow gold, white gold, and rose gold depending on the metal composition.
The Dutch Hallmarking Act and 9 karat gold
According to the Dutch Hallmarking Act, gold products may only be sold as "gold" if they have a minimum karat content of 14 karat (58.5% pure gold). Since 9 karat gold contains only 37.5% pure gold, it does not meet this requirement and may not be classified or sold as gold in the Netherlands. 9 karat gold jewelry is considered a gold alloy in the Netherlands — not as gold. In countries such as the United Kingdom and Australia, 9 karat gold is recognized as a common type of gold and is stamped with "375" (37.5% pure gold).
9 karat gold versus other karats
9 karat — 37.5% pure gold, hardest and most wear-resistant, affordable, not recognized as gold in the Netherlands. 14 karat — 58.5% pure gold, good balance between purity and durability, legally recognized as gold in the Netherlands. 18 karat — 75% pure gold, richer gold color and more luster, softer and more susceptible to wear. 24 karat — 100% pure gold, rarely used for daily jewelry due to fragility and high cost. Check out our earrings collection for jewelry in different materials.
Frequently asked questions about 9 karat gold
- Why can't 9 karat gold be sold as gold in the Netherlands?
- According to the Dutch Hallmarking Act, gold must be at least 14 karat (58.5% pure gold) to be sold as gold. 9 karat gold contains only 37.5% pure gold and does not meet this standard — it is classified as a gold alloy in the Netherlands.
- Is 9 karat gold suitable for daily wear?
- Yes, 9 karat gold is very suitable for daily wear due to the hardness and wear resistance of the alloy. It is less susceptible to scratches and damage than higher karat gold.
- How do I recognize 9 karat gold?
- In countries where 9 karat gold is recognized (such as the UK), it is stamped with "375" — referring to 37.5% pure gold. In the Netherlands, you will not find an official hallmark on 9 karat jewelry because it is not recognized as gold.
- Does 9 karat gold lose its shine?
- Like any metal, 9 karat gold can lose some of its shine over time, especially with daily wear. Regular maintenance and cleaning with a soft cloth help maintain its luster longer.
- Is 9 karat gold hypoallergenic?
- Not always. Some people are allergic to nickel or copper added to 9 karat gold. For sensitive skin, it is better to choose 14 karat or higher, or nickel-free alternatives such as titanium or 925 silver. Read more on our nickel allergy explanation page.