1 oz Silver Australian Koala specifications and ping frequencies
The 1 oz Silver Australian Koala is a silver coin from Australia (2007–2026), weighing 31.1 g with a diameter of 40.6 mm. Tapped gently on its edge, a genuine one rings at about 3.7 kHz, 8.6 kHz and 15.2 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 | 3676 Hz · 8643 Hz · 15160 Hz |
|---|---|
| Metal | Silver |
| Composition | 99.9% silver, 0.1% copper |
| Weight | 31.1 g |
| Fine metal content | 31.069 g |
| Diameter | 40.6 mm |
| Thickness | 2.98 mm |
| Face value | $1 AUD |
| Country | Australia |
| Years | 2007 - 2026 |
Compare with the ping frequencies of every supported coin.
How to Spot a Fake Koala
Counterfeit 1 oz Silver Australian Koala 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 31.1g)
- 🚨Wrong diameter (should be 40.6mm) or thickness (should be 2.98mm)
- 🚨Flat or dull sound instead of sustained bell-like ring
- 🚨Magnetic attraction (genuine .9999 silver is not magnetic)
About the Koala
First issued in 2007 by the Perth Mint, the Silver Koala features one of Australia's most beloved animals with a new design each year. The coin rapidly became popular among collectors due to its annual design changes, .9999 silver purity, and the Perth Mint's reputation for exceptional strike quality.
Authenticate Your Koala on the Go
Download Pingcoin for iPhone or Android to instantly verify your Koala and other precious metal coins using acoustic authentication.