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A Test Grid Dredged for Gold Values

The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.

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A Test Grid Dredged for Gold Values


The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.

Ancestral Yuba River Placer Gold Deposits


The small-scale miner has reasonable opportunity to exploit some of these small, rich placer gold deposits. 

The “Chuck It Out” Nugget


This was no ordinary nugget. It had not traveled very far from its nearby source, and that did mean a lot, as we were searching for the source of several such nuggets found during a gold rush that occurred in 1859.

Small-Scale Hard Rock Mining With Water Recycling


Once I have established the presence of gold in the sample, I collect five-gallon bucket quantities of the rock material for processing back at my shop.

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.

Proper Placer Sample Processing


...your sampling procedures should not be designed to catch gold your mining technique will never recover.

Understanding Rock Formations: Petrology for Prospectors


There are times when being able to recognize a type of rock can make you a much more successful prospector.

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