Ask the Experts

January 2015 by Don Robinson

Ask the Experts

January 2015
• How do I clean up gold encrusted with iron-sulfides?

Ask The Experts

April 2016
• Should I focus efforts on this particular rock type?

Ask The Experts: What is a Spanish needle?

July 2017

Some fellow in Texas was selling a Spanish needle—a dousing device used to recover minerals in the old days. Do you know anything about these?

Ask The Experts - Does gravel + bedrock = gold?

December 2019

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

June 2015
Is this a valid claim?

Ask The Experts - How much silver per ton does it take to make a mine profitable?

June 2020

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