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History & Geology

Natural Gold Alloys

Natural gold is never 100% pure; all natural nuggets contain at least some impurities. We're going to take a look at just what some of those impurities might be.

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Placer Mining At Chititu Creek, Alaska


There is reason to believe these stream valleys are still rich with gold, silver and copper.

Enrichment of Mineral Deposits by Weathering—Part II


While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.

What Are Those Rocks In My Pan?


The placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.

Round Mountain, Nevada


There are a number of veins in the disseminated mineralization, but the principle ones on Round Mountain are known as the Los Gazabo and the Keane.

Conrey Dredge No. 4—Part II


These were the men who periodically picked up the gold amalgam from the tables and sluices in the dredge, processed it, and transported the gold ingots to the railroad express office in Alder. Their trustworthiness must have commanded a prominent wage.

The Downieville Gold District


Many locals are just waiting for California to allow dredging once more, especially with the current gold prices. There are still plenty of good opportunities for prospectors in this area, just as it has been for so many years.

Gold Deposits of Montana


Historically, Montana has been an important gold producer, in terms of both lodes and placers, and it still produces gold for the prospector today.

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