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US Mint · United States
American Gold Buffalo 1 oz
1 troy oz — 99.99% Goldgoldcurrent
The first-ever 24-karat (.9999 fine) gold coin produced by the US Mint. Based on James Earle Fraser's classic 1913 Buffalo Nickel design.
Physical Specifications
| Mass | 31.1035 g |
| Troy Ounces | 1 oz |
| Diameter | 32.7 mm |
| Thickness | 2.95 mm |
| Edge | reeded |
| Purity | 99.99% Gold |
| Fineness | 0.9999 |
| Density | 19.3 g/cm³ |
| Face Value | 50 USD |
| Series | American Buffalo |
| First Minted | 2006 |
| Ping Frequency | 3,182 Hz |
Authentication Reference
Use these values to verify an authentic American Gold Buffalo 1 oz. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Weight
31.1035grams
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter32.7mm
Thickness2.95mm
Use plastic calipers (not steel — avoid scratching). Or use the camera tool with a bank card as reference (ISO 7810: 85.60mm × 53.98mm).
Acoustic Ping
3,182Hz ±3%
Balance the coin on your fingertip and tap the edge with a pencil or plastic pen. Use the Ping Tester to analyse the ring.