The Australian Standards
Below are the symbols used when Carat stamping metal to the Australian Standards.
9ct Gold 37.5% Pure Gold Symbol 375
10ct Gold 41.7% Pure Gold Symbol 417
14ct Gold 58.5% Pure Gold Symbol 585
18ct Gold 75% Pure Gold Symbol 750
Platinum 95% or 96% Pure Platinum Symbol 950 or 960
Palladium 95% Pure Palladium Symbol 950
Sterling Silver 92.5% Pure Sterling Silver Symbol 925