US Mint · United States
Half-ounce American Gold Eagle containing 1/2 troy ounce of gold. Shares the same 22-karat composition as the full-ounce version.
| Mass | 16.966 g |
| Troy Ounces | 0.5455 oz |
| Diameter | 27 mm |
| Thickness | 2.15 mm |
| Edge | reeded |
| Purity | 91.67% Gold, 3% Silver, 5.33% Copper |
| Fineness | 0.9167 |
| Density | 17.8 g/cm³ |
| Face Value | 25 USD |
| Series | American Eagle |
| First Minted | 1986 |
| Ping Frequency | 4,901 Hz |
Use these values to verify an authentic American Gold Eagle 1/2 oz. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Use plastic calipers (not steel — avoid scratching). Or use the camera tool with a bank card as reference (ISO 7810: 85.60mm × 53.98mm).
Balance the coin on your fingertip and tap the edge with a pencil or plastic pen. Use the Ping Tester to analyse the ring.