Purity refers to how much gold the bar actually contains. The purest is 9999 gold bar, meaning it contains 99.99 percent of gold. In some countries, their purest gold is at 96.5 while others are 98.5 percent pure. Its purity depends on which country it was manufactured and how much alloy and gold were mixed together. Gold mixed with alloy makes it hard enough and resistant to damage like scratches and dents. Gold in its purest form is soft. Therefore, there is no manufactured that is 100 percent pure. For manufacturers to be able to shape them into coins or bars, the gold needs to be mixed with another type of metal alloys like copper.
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