Gold is arguably the most precious metal in the world, but how rare is it really? We went on our own gold panning expedition to find out. Correction (6:08): While there was active gold mining around Butte, Montana, the Berkeley Pit mine pictured was primarily a copper mine. Further reading: “Gold Panning is Easy” guidebook: panning is easy Article on the cosmic origin of gold: Study on gold-rich asteroid bombardment: Gold Council statistics on gold supply: Earthworks “No Dirty Gold” campaign: #.Uk3qySR57bo International mining standards guidance:
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