1/2 oz Gold Mexican Libertad specifications and ping frequencies
The 1/2 oz Gold Mexican Libertad is a gold coin from Mexico (2000–2023), weighing 15.55 g with a diameter of 29 mm. Tapped gently on its edge, a genuine one rings at about 2.8 kHz, 6.7 kHz and 12.1 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 | 2766 Hz · 6724 Hz · 12074 Hz |
|---|---|
| Metal | Gold |
| Composition | 99.9% gold |
| Weight | 15.55 g |
| Fine metal content | 15.534 g |
| Diameter | 29 mm |
| Thickness | 1.75 mm |
| Country | Mexico |
| Years | 2000 - 2023 |
Compare with the ping frequencies of every supported coin.
How to Spot a Fake Libertad
Counterfeit 1/2 oz Gold Mexican Libertad coins are increasingly common. Use the acoustic verifier above as your first line of defense, then check these key red flags:
- 🚨Incorrect weight (should be exactly 15.55g)
- 🚨Wrong diameter (should be 29mm) or thickness (should be 1.75mm)
- 🚨Flat or muted ping sound instead of clear ring
- 🚨Magnetic attraction (genuine gold libertads are not magnetic)
About the Libertad
The Gold Libertad series has been produced by Casa de Moneda de México since 1981 in various sizes. The 1/2 oz version features the same iconic Angel of Independence design as the full ounce coin. Earlier gold Libertads (pre-1991) were struck in .900 fine gold, giving them a distinctive warm color from the copper alloy content. Gold Libertads are known for very low mintages, making them among the scarcest gold bullion coins.
Authenticate Your Libertad on the Go
Download Pingcoin for iPhone or Android to instantly verify your Libertad and other precious metal coins using acoustic authentication.