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Using Rock Formations to Your Advantage

Over the past twenty or more years, the traditional “seat of the pants” science of using mineral identification tables as a means to identify common ore minerals, their associated rock-forming minerals and rocks, has slowly become a lost art.

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The Stonewall Jackson Mine, San Diego County, California


For obvious reasons southern California is not known historically for its gold mines. Gold production was concentrated heavily in the Sierra Nevada foothills in the northern part of the state. However, the high mountainous region of eastern San Diego County was the site of a number of productive hardrock gold mines, notably in the late 19th century.

Small High-Grade Pocket Districts


…the excitement passed so quickly that little work was done, but they still have good potential, and I find they are not as well-known and not hit so hard by most prospectors.

Platinum and Diamond Discoveries Shine New Light on Historic Alaska Gold-Mining District


A rush of platinum and diamond exploration projects and discoveries is generating renewed interest in the historic gold-producing region of the Yentna-Cache Creek District in south-central Alaska.

Ask the Experts: Quartz rock and the chance of gold in my area of New Hampshire?


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.

Mining Stock Quotes and Mineral & Metal Prices


California Destroys Another Prospecting Business


His small business managed to pump millions of dollars over the years into the California economy.

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