Fineness marks show platinum purity per 1000 parts. Use this chart with the Platinum Calculator to estimate melt value.
| Mark | Purity | Common uses |
|---|---|---|
| 999 Fine Platinum | 99.9% | Investment bars and bullion coins. |
| Pt950 Platinum | 95.0% | The most common standard for platinum jewelry, rings, and wedding bands. |
| Pt900 Platinum | 90.0% | Used in some jewelry, especially older or European pieces. |
| Pt850 Platinum | 85.0% | A lower-purity platinum alloy, occasionally used in jewelry. |
Pt950 means the ring is 95% pure platinum, alloyed with 5% other metals — the most common purity standard for platinum jewelry worldwide.
Usually, yes. Platinum jewelry is typically 90-95% pure, while gold jewelry commonly ranges from 41.7% (10k) to 75% (18k) — platinum's higher purity is one reason it's often more expensive per gram of finished jewelry.