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Royal Mint · United Kingdom
Gold Sovereign (Full)
0.2354 troy oz — 91.67% Gold, 8.33% Coppergoldcurrent
Iconic 22-carat British gold coin with Pistrucci's St George and the Dragon reverse. Contains 7.32g fine gold. CGT-free UK legal tender.
Physical Specifications
| Mass | 7.988 g |
| Troy Ounces | 0.2354 oz |
| Diameter | 22.05 mm |
| Thickness | 1.52 mm |
| Edge | reeded |
| Purity | 91.67% Gold, 8.33% Copper |
| Fineness | 0.9167 |
| Density | 17.5 g/cm³ |
| Face Value | 1 GBP |
| Series | Sovereign |
| First Minted | 1817 |
| Ping Frequency | 5,659 Hz |
Authentication Reference
Use these values to verify an authentic Gold Sovereign (Full). All tests can be performed with a digital scale, calipers, and the EON ping tester.
Weight
7.988grams
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter22.05mm
Thickness1.52mm
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
5,659Hz ±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.