Not sure I’d trust this myself as gold often gets picked up stuck to the black sand and I’m sure this would just launch the excess into orbit!
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Yeah. Better to have magnets in a classifying sluice / gold cube.
I use a magnet under my plastic pan. sucks up the easy stuff. and then carefully wash through the magnetic dregs under a bright light to make sure I’ve got it all. anything my eyes can’t see due to size will get missed though. I don’t like loosing even the tiniest of specs. fussy
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