Scientists have discovered very small traces of gold in soil several meters deep. They believe the gold grows like potatoes, underneath the surface. Soil microbes create the gold flakes somehow. Scientists are studying this process to replicate the work in labs. Some believe the procedure may take millions of years in the soil for a nugget of gold to form.
In another interesting note, gold is “grown” through a weed called horsetail. When the horsetail is harvested and burnt, there are traces of gold in the ashes. If the soil in which the horsetail is growing has a gold concentration, the plant absorbs this metal. While this is possible, it would take, literally, tons of horsetail to produce a good amount of gold.
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