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• Determining the amount of gold in a specimen

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Small-Scale Hard Rock Production


So far this year we have recovered over three pounds of gold and the hard rock veins seem to go on forever. We now have three claims that can produce good enough gold to set up a productive operation.

Care and Lubrication of a Model 13 Laboratory Wilfley Table


A Wilfley table works best when all of the mineral being run across it (the pulp) is about the same size.  For this reason, I took a good look at each of the samples.

Wilfley Tables—Repair, Rebuild & Set Up


I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...

Shaker Tables for Processing Hard Rock Ores


Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.

Recovering Fine Gold with Oleophilic Adhesion


Oleophilic means "affinity to or attracted to oils," and this includes gold an diamonds.

Hand Panning Micro-Fine Gold


Once you get down to the black sands or a few tablespoons of material, the technique changes dramatically.

Volume is the Key to Success


While recovery rates are important, they must necessarily be secondary to the volume of material processed. Running more material at lower recovery rates is generally preferable to increasing the efficiency of the system.

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