Monetary Denomination (AUD) 100 25 15 Fineness (% purity) 99.99 99.99 99.99 Minimum Gross Weight (g) 31.112 7.777 3.111 Maximum Diameter (mm) 39.34 22.60 18.60 Maximum Thickness (mm) 2.50 2.20 2.00. This item is in the category "Coins & Paper Money\Bullion\Gold\Coins". The seller is "platinum999e" and is located in this country: US. This item can be shipped to United States, China, Brazil.