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The Portable XRF Gun


While there is no metal detector that will see only gold, there is a device that can reliably distinguish gold from lead, copper, iron or other metals. It is an X-Ray fluorescence tester, sometimes called an XRF gun.

Ask The Experts - What assay value is needed for cobalt deposits?


Ask The Experts - Is a detector any good at discriminating pyrite or chalcopyrite in ferrous-reject mode?


Ask The Experts - Sampling and assays


Ask The Experts - Were there insufficient values to continue mining at this site?


Were there insufficient values to continue mining at this site?

Ask The Experts - How do I process this white quartz with black striations?


Ask the Experts: Tantalite in an African nation -- is it worth pursuing?


Q: Tantalite in an African nation -- is it worth pursuing?

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The Bawl Mill   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Finding Gold with a VLF Detector—Part III   • Silver and Base Metal Deposits of the Pioche District   • California Dredgers: A Step Closer to Getting Back in the Water   • Arizona's Youngest...and Oldest Prospector   • Exploring Placers with Auger Drills   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices   • Correction   • Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks

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Legislative and Regulatory Update   • A Few Methods for Sampling Hardrock Deposits   • Protecting Our Access to Public Lands

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