| 24K | 99.9% | Pure gold, very soft | Investment, high-end electronics, and some jewelry |
| 22K | 91.7% | High gold content, slightly more durable | High-quality jewelry, coins |
| 20K | 83.3% | High purity, good balance of durability | Fine jewelry, luxury items |
| 18K | 75.0% | Standard for fine jewelry | Engagement rings, fine jewelry |
| 14K | 58.3% | More durable, common in the US | Everyday jewelry, engagement rings |
| 12K | 50.0% | Balanced durability and gold content | Jewelry, decorative items |
| 10K | 41.7% | Durable, lower gold content | Affordable jewelry, particularly in the US |
| 9K | 37.5% | Very durable, low gold content | Budget-friendly jewelry, commonly used in the UK and Europe |