Ask The Experts

December 2014 by Chris Ralph

Ask the Experts

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

Ask The Experts - Need advice on melting gold

January 2019

Ask the Experts - Processing sulfide ore without mercury or cyanide.

February 2012
Q: ...Is there any way to process the ore without using mercury or cyanides...?

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.

Ask The Experts

December 2014
• Determining the amount of gold in a specimen

Ask The Experts

July 2015
Q: What amount of silver is considered the best find ever?

Ask The Experts

September 2015
Gold deposits and outer space

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