Johnson Matthey for Credit Suisse - A 'four nines' gold bullion bar paperweight

presented in a protective clear plastic wallet, 100g

It is said that there is no such thing as 'pure' gold - there will always be some impurity within the metal, however small. The nearest that is commercially traded is so-called 'fine' or 'four nines' gold - 9999/10000 or 99.99% pure - as this example.