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The Lost Silver Triangle of the Sierra Madre—Part II

Newspaper stories in the spring of 1887 credited Lieutenant Henry O. Flipper with discovering both the long-lost Guaynopa and Tayopa mines. Flipper was in Mexico City in late April and May and a reporter interviewed him.

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Gold From Black Sand Tailings


The pile up on the small hill had to be a couple yards of black sand. I’m not one to ignore a little gold even if it is small in size—I have always believed that gold fever comes in all sizes.

Gold in Guyana—Part I: Porknocking on the Puruni River Road


In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.

Melman on Gold & Silver


Much of the past 12 months, both in America and around the world, has been devoted to discussions of Keynesianism versus the Austrian School of economics; of the value versus risks of “Quantitative Easing,” of free markets versus government-dominated markets; and of the right of government to accede to unlimited demands on her resources, no matter the cost.

Route Planning Using GPS


My intention was to end this discussion with waypoints and routes, then I found USGS maps of the Plainfield Quadrangle.

Drywashing Alluvial Placers


Portable, hand-operated, bellows drywashers have been used for over a hundred years to recover gold in the deserts of Arizona, New Mexico, California and Nevada. Drywashers were considered a last resort over...

Higher Zinc Price Creates Opportunity


Zinc is brittle and crystalline at ordinary temperatures, but when heated to between 110°C and 150°C it becomes ductile and malleable; it can then be rolled into sheets. The bluish-white metal is used principally for galvanizing iron, but also...

Platinum Placers and Nuggets


Sometimes a placer miner will find small bits and nuggets of metal associated with gold and other heavy minerals in his concentrates, which exhibits a silver-gray color rather than the normal tones of gold.

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The Bawl Mill   • Ask the Experts—Why doesn't the 1872 Mining Law apply to all 50 states?   • Ask The Experts—Where do I find information about getting paid for raw gold?   • Understanding Geologic Deposit Models   • Prospecting for Diamonds   • Avino’s Durango Project   • Success With A Detector   • Horsetail Gold   • The Makorakoza of Zimbabwe—Centuries of Prospecting in Gold-Hosting Dolerites   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

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