9K Gold
37.5% pure gold — the UK and Australia standard.
9 karat gold contains 9 parts gold out of 24 — 37.5% purity. It is the legal minimum for jewelry sold as gold in the UK, Ireland, and Australia. It is harder and more affordable than higher-karat alternatives, with a paler colour due to lower gold content.
9K gold at a glance
How 9K compares to other karats
| K数 | 纯度 | 印记 | 颜色 | 耐用性 | 最适用于 |
|---|---|---|---|---|---|
| 24K | 99.9% | 999 | 亮黄色 | 非常软 | 金条、投资、镀金 |
| 22K | 91.6% | 916 | 深黄色 | 较软 | 婚庆首饰，南亚市场 |
| 18K | 75.0% | 750 | 浓黄色 | 适中 | 精品首饰，欧洲标准 |
| 14K | 58.5% | 585 | 暖黄色 | 坚硬 | 日常戒指，美国标准 |
| 10K | 41.7% | 417 | 淡黄色 | 非常坚硬 | 经济型首饰，美国市场 |
| 9K ← | 37.5% | 375 | 淡黄色 | 非常坚硬 | UK, Ireland, Australia |
Who buys 9K gold — and why
Advantages of 9K
- Most affordable gold option
- Hardest and most scratch-resistant karat
- UK and Australian hallmarking standard
- Good for children's jewelry and budget rings
- Widely available in British and Irish jewellers
Disadvantages of 9K
- Paler, less rich yellow colour
- Can tarnish faster than 14K or 18K
- Higher base-metal content — more allergy risk for sensitive skin
- Lower resale value per gram
- Not recognised as gold in some countries (e.g. Italy requires 14K minimum)
常见问题
Is 9K gold real gold?
Yes. 9K gold is real gold — it contains 37.5% pure gold (375 parts per thousand), with the remaining 62.5% being alloy metals such as copper, silver, and zinc. It is the minimum gold content legally sold as gold in the UK, Ireland, and Australia. While lower in gold content than 14K or 18K, it is genuine gold.
What is the 375 hallmark on jewelry?
375 is the hallmark for 9K gold. It means 375 parts per thousand (37.5%) of the alloy is pure gold. In the UK, Ireland, and Australia, you will commonly find 375 stamped on gold rings, chains, and earrings. It is equivalent to the 9ct or 9K designation.
Is 9K gold good for everyday jewelry?
9K gold is very durable for everyday wear because it contains more hardening alloy metals than 14K or 18K. It is scratch-resistant and holds its shape well under friction. The trade-off is a paler yellow colour and higher potential for skin reactions if you are sensitive to copper or silver alloys.
What is the difference between 9K and 14K gold?
9K has 37.5% gold vs 58.5% in 14K. 9K is harder, more affordable, and the standard in UK and Australia. 14K is more common in the US and has a richer yellow colour. 9K is more prone to tarnishing over time due to higher base metal content.