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How to Recognize Hard Rock Gold Ores

I regularly get inquiries along the line of: “Hey, I found this rock, and I think it might be gold ore. How can I tell?” Prospectors are always on the lookout for gold-bearing rocks that may be the source of any nearby placer gold.

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Company Notes


• Homestake Mining Company
• Placer Dome Inc.
• AZCO Mining Inc.
• Guyana Diamond Corp.
• Canadian Mining Company, Ltd.
• Hecla Mining Company
• Pan American Silver Corp.

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.

Hand Panning Micro-Fine Gold


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

Hard Rock Milling: A Matter of Scale


Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.

How to Refine Silver—Pt II


Silver recovery from low-level solutions is frequently done in a cell that has a cathode with 2 to 5 or more times the surface area as the anode.

How to Upgrade Your Pocket Plunger


These three simple upgrades, when taken together, will considerably increase a pocket plunger’s magnetic pull and make it less susceptible to breakage.

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.

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