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Gold Recovery with Centrifugal Bowls


Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.

Cutbacks at S. African Mines—Britain Blamed


South African gold miners are turning their anger towards Britain, charging that the sale of 25 tons of gold by the Bank of England has depressed gold prices and put them out of work.

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.
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Your Sonic Drilling Partner-As seen on GOLD RUSH

Nevada Looks to Tourism to Fill Mining's Gap


Lt. Gov. Lorraine Hunt and the Nevada Commission on Tourism have agreed to seek an unspecified amount of marketing funds to boost tourism in the Ely, Nevada area in the wake of a mine closing.

A Few Methods for Sampling Hardrock Deposits


With a little homework and a methodical approach to sampling, a prospector can determine if a deposit is worthy of more of an investment...

Exploring Placers with Auger Drills


Augers can be used effectively for placer exploration with certain limitations.
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Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks


I had never run an impact mill before, but anything involving rocks, water and a big electric motor sounded great.

Ask the Experts


How do mines and refiners deal with doré bars?

Finding Gold with a VLF Detector—Part II


It is this ability to hear and respond to the faintest of audio signals that I believe separates the best nugget hunters from everyone else.
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Sonic Concentrator--Advanced Concentration Technology

Ask the Experts


Bismuth oxide for assaying?

Mining for Gold and Sapphires in Montana


Fascinated by the sapphires—and the gold that occured with them—he was soon buying parcels of property and setting up his own commercial-scale gravel processing plants.

Finding Gold with a VLF Detector—Part I


The very first thing to find out...is if the detector has the ability to be ground balanced.
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Professionally engineered picks for prospectors, miners & treasure hunters

Recovering Fine Gold with Oleophilic Adhesion


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

Ask the Experts


Breaking cemented gravels

Twenty-Five Gold Indicators You Should Know


I frequently get asked, "What should I look for when I am out prospecting that will tell me there are good amounts of gold present in the ground?"

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Alternative Gold Leaching Methods


The ideal leaching chemical would leave behind what we don't want or need in the ore and take only the valuable metals.

Prospecting for Diamonds in Kimberlite


Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.

Ask the Experts


Ore testing and other advice for starting up a mining operation.
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Hunting for Hardrock: The Basics


Exposed veins and outcroppings can be a great source for gathering good gold ore for processing. Veins and outcroppings do require a lot of work to free the ore from its earthen grip, but this labor can be very rewarding.

Proper Placer Sample Processing


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

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