Wow, I didn't know about alluvial gold mining. I bet those rivers are filled with fine gold.
a mat of foam-like material
What kind of substance is used as a gold mat? I'm imagining somthing like packing material or cloth?
I'm interested in learning more! (Came here from ListNerds)
The kind of substance is just like form but is full of holes to trap the gold, as a result of the force of gravity the gold is stuck inside the mat.
look at the image below 👇👇
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