Investment gold has a content of at least 90%. On the website, we have listed Gold coin The exact gold content is indicated ranging between 90 and 99.999% gold content. Especially the weight of gold determines the price of the product. A good example is the Krugerrand Gold coin. This coin contains one troy ounce of gold but has a content of 91.67%. Copper has been added to the coin. This copper is irrelevant to the price.