⅒ Ounce Krugerrand specifications and ping frequencies
The ⅒ Ounce Krugerrand is a gold coin from South Africa (1980–2026), weighing 3.39 g with a diameter of 16.5 mm. Tapped gently on its edge, a genuine one is expected to ring at about 7.4 kHz, 17.1 kHz and 29.6 kHz: its first resonance frequencies, set by its metal, size and thickness. A counterfeit made of a different metal, or with a different weight or thickness, rings at different frequencies, which is what the ping test above checks.
| Ping test reference frequencies | 7430 Hz · 17090 Hz · 29579 Hz |
|---|---|
| Metal | Gold |
| Composition | 91.7% gold, 8.3% copper |
| Weight | 3.39 g |
| Fine metal content | 3.109 g |
| Diameter | 16.5 mm |
| Thickness | 1.3 mm |
| Face value | ⅒ Krugerrand |
| Country | South Africa |
| Years | 1980 - 2026 |
These reference frequencies are predicted by our resonance model from the coin’s weight, size and metal, and not yet confirmed with recordings. Compare with the ping frequencies of every supported coin.
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