Ask the Experts

April 2014 by Chris Ralph

Ask The Experts - How much rock shall I crush to determine the value?

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July 2018

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August 2019

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October 2014
• Sweep speed and sensitivity settings for a GPX-4500

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September 2015
Replacing cloth on a drywasher

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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The Bawl Mill   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Ask the Experts   • Mining for Gold and Sapphires in Montana   • Contrary to Rumors, Couple Will Keep the Saddle Ridge Hoard   • Finding Gold with a VLF Detector—Part I   • Creating Your Own Luck   • Over the Divide—Robert Michael “Mike” Corbley   • Continuing Hard Rock Exploration   • Recovering Fine Gold with Oleophilic Adhesion   • Detecting for Gold in Nevada   • Using Structural Clues to Locate Buried Placer Channels   • Gold Deposits of the Ivory Coast   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

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