Ask the Experts

June 2014 by Chris Ralph

Ask the Experts

April 2014
Buying a turquoise claim

The Portable XRF Gun

November 2012
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.

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April 2012
Q: Can a voltmeter be used to determine the type of metal/mineral present in soil?

Ask The Experts - Any references on gold formation?

March 2019

Ask The Experts: Could you expand on your previous blasting article?

January 2017

Q: Could you write more about the last two methods that you mentioned—the expanding chemical mixtures and the micro blasters, how and when to use them, and when not to use them?

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May 2014
Setting up a gravity dredge

Ask The Experts - Help with an assay report

February 2018

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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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