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Perth Mint · Australia
Gold Kangaroo 1 oz
1 troy oz — 99.99% Goldgoldcurrent
Flagship gold bullion coin of the Perth Mint, originally launched as the Gold Nugget in 1986 and redesigned with the kangaroo motif from 1989. Annual reverse design changes.
Physical Specifications
| Mass | 31.107 g |
| Troy Ounces | 1 oz |
| Diameter | 32.6 mm |
| Thickness | 2.95 mm |
| Edge | reeded |
| Purity | 99.99% Gold |
| Fineness | 0.9999 |
| Density | 19.3 g/cm³ |
| Face Value | 100 AUD |
| Series | Australian Kangaroo |
| First Minted | 1987 |
| Ping Frequency | 3,508 Hz |
Authentication Reference
Use these values to verify an authentic Gold Kangaroo 1 oz. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Weight
31.107grams
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter32.6mm
Thickness2.95mm
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
3,508Hz ±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.