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How to Refine Silver—Pt I

Silver refining has been used from ancient times to change the characteristics of the metal. Early metallurgists refined silver by heating it a couple hundred degrees above its melting point and holding the metal at an elevated temperature for a period of time.

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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.

A New Method for Handling Stubborn Gravity Middlings


The solution focused on the relative difference in malleability between gold and waste, rather than the difference in density exploited by gravity circuits.

Nice Specimen Gold Recovered in Northern California


Each specimen is carefully examined to determine if it would be beneficial or not to use an acid treatment to reveal more of the gold.

Prospecting Hard Rock


We panned out maybe three gold pans of the material and we were shocked at the gold that was there. This rock appeared to be rich.

Papa's Got A Brand New Dredge!


It was time to prime the pump and start the engine! Dan’s priming method is to use a small, submersible, 12-volt pump. My priming method is to use a hand-operated diaphragm pump.

Excavator Testing Wet Placer Ground


The excavator or backhoe has become the tool of choice for testing placer ground. These machines are the best way to explore and sample a placer deposit if the ground is not too wet or frozen and bedrock is not beyond the reach of the machine.

Ask the Experts: Silent partners and mining—is it worth the risk?


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The Bawl Mill   • Ask The Experts - How do I remove the silvery-white coating from my gold?   • Ask The Experts - Is it possible to mine glacial moraine placer deposits?   • Ask The Experts - Why are some valid mining claims missing from apps when researching land status?   • Ask The Experts - Is using a drywasher legal in California   • A High Country Patch   • An Update On The Father's Day Gold Discovery   • Exploring The Historic Rand Mining District, Southern California   • Disturbing Trend: Federal Judges Disregard Mining Laws   • My First Carolina Nugget   • Step-by-Step Crevicing   • Melman on Gold & Silver   • Mom Finds 3.72-Carat Yellow Diamond   • Mining Stock Quotes and Mineral & Metal Prices

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Legislative and Regulatory Update   • PLP Update: How to Restore The Rights of Suction Dredge Miners

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