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Royal Mint · United Kingdom
Gold Half Sovereign
0.1177 troy oz — 91.67% Gold, 8.33% Coppergoldcurrent
Half-size version of the sovereign, containing 3.66g of fine gold. Popular affordable British gold coin with historic pedigree.
Physical Specifications
| Mass | 3.994 g |
| Troy Ounces | 0.1177 oz |
| Diameter | 19.3 mm |
| Thickness | 0.99 mm |
| Edge | reeded |
| Purity | 91.67% Gold, 8.33% Copper |
| Fineness | 0.9167 |
| Density | 17.5 g/cm³ |
| Face Value | 0.50 GBP |
| Series | Sovereign |
| First Minted | 1817 |
| Ping Frequency | 4,794 Hz |
Authentication Reference
Use these values to verify an authentic Gold Half Sovereign. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Weight
3.994grams
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter19.3mm
Thickness0.99mm
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
4,794Hz ±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.