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Placer Platinum

The platinum group metals (PGMs) are divided into three that are “light,” about the same atomic weight as silver, and three that are “heavy,” about the same atomic weight as gold. The three light PGMs are ruthenium, rhodium, and palladium, and the three heavy PGMs are osmium, iridium, and platinum.

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Looking Back


Excerpts for CMJ published 50 years ago this month.

Mining Stock Quotes and Mineral & Metal Prices


Metals Trader Blows the Whistle on Gold & Silver Price Manipulation


Maguire and the traders and companies they represent were all aware of the price manipulation and were all profiting from it, but it became such a regular occurrence that his conscience told him it was time to put a stop to it. That’s when he contacted the CFTC.

Washoe County Balks at Black Rock Desert Plan


The Washoe County Commission raised concerns about Sen. Richard Bryan's tentative proposal to protect the Black Rock Desert...

New Life for the Suction Nozzle


The suction nozzle was one of the first Venturi nozzles to be used in the dredging business. Years later it was replaced with the straight Venturi system, which is sometimes referred to as a “log.” The main benefit of the log is that the operator only needs a suction hose with a short nozzle.

Preparing For The 2021 Mining Season


On my final prospecting day of 2020, I went up to a spot where I had found gold years before and had my best day of  the year—four nuggets for nearly one-quarter-ounce of gold.

Bullion River's French Gulch Gold Mine


A gold button from Bullion River's French Gulch gold mineBullion River’s high-grade gold mine at French Gulch, near Redding, California, may be in some ways the last of the Mohicans, or perhaps it is the first of the great revival, but for the near term it is probably destined to be a little bit of both.

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The Bawl Mill   • Higher Copper Price Brings Hope, Jobs   • Zeballos Gold Camp, British Columbia   • Agreement Allows Pogo Mine to Resume Construction   • Treasure Hawk Mine Back in Action   • Oregon Dredgers Receive Threats From Environmentalists   • Understanding Hard Rock Mining: Terms and Methods—Part I   • Mood at Calgary Conference is Subdued, But Optomistic   • Reinventing the Wheel—The Infinity-Jet   • Company Notes   • Endangered Species Act is a Mess   • Here Come the MineBots   • Agency Gives Initial Backing to Kensington Mine   • Mining Stock Quotes and Mineral & Metal Prices   • Looking Back   • Melman on Gold & Silver   • Brits Thwart Robbery of Gold and Cash

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