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History & Geology

Jadeite in California

...two jadeite locations in California have been thoroughly researched by geologists. There are no doubt others that lie in wait.

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Picks & Pans: Gold Recovery in Placer Mining Operations


Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.

Ask The Experts


Sulfides and oxides—what's the difference between the two?

Reno's 1872 Time Capsule Includes Gold Rush Lore


The Reno Masonic Lodge was built along the railroad tracks back when Ulysses S. Grant was president and shortly after the Comstock Lode of gold and silver was struck in Virginia City.

Las Médulas—The Gem of the Roman Gold Mines


This mine was a real wonder of engineering, and the water supply and drifts had to be carefully managed to keep it in operation. In fact, it didn’t close due to lack of gold, but instead closed with the fall of the Roman Empire.

Mass Wasting & Gold Deposits


Not all of these slides and debris flows will produce results, but if you search for these while prospecting in your gold producing areas, then you can increase your odds of finding new gold.

The Miner’s Switchback


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Surface Indications Of Quartz Adularia Epithermal Deposits


I am going to keep to the basics of surface indications and visual clues in the rocks and minerals themselves that help me find gold-bearing veins in this classification of deposits.

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The Bawl Mill   • Our Readers Say   • Ask The Experts   • Ask The Experts   • Exploring Snakehead   • One of the Richest Beaches Ever Mined   • Prospecting for Gold in Baja California   • What's All This Talk About Mining Districts?   • The Power of Mining Districts   • What is a Mining Right?   • The Gold, Silver and Base Metal Mines of Eureka, Nevada   • Tips for Detecting Nugget Patches   • Mining Stock Quotes and Mineral & Metal Prices   • State Lends Help to County in Nevada Road Fight   • Melman on Gold & Silver   • Utah Approves funds to Fight Feds

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