For the companies exploring for gold, a deposit that has more than one gram of gold for every tonne of earth is an exciting prospect. In fact, in our 2013 report summarizing the world’s gold deposits, we found that the average grade of gold deposits in the world is around that amount: about 1.01 g/t.
Think about that for a moment. One gram (0.035 oz) is equal to the mass of a small paper clip. This small amount of gold is usually not even in one place – it is dispersed through a tonne of rock and dirt in smaller amounts, most of the time invisible to the naked eye. For some companies that have the stars align with easy metallurgy, a deposit near surface, and open pit potential, this gram per tonne deposit may even somehow be economic.
It’s hard to believe that such a small amount of gold could be worth so much, and that is why great visualizations can help us understand the rarity of this yellow metal. Luckily, the folks at Demonocracy.info have done the heavy lifting for us, putting together a series of 3D visualizations of gold bullion bars showcasing the world’s gold that has been mined thus far.