Ask The Experts: What is a Spanish needle?
July 2017 by Chris Ralph
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?
Q: ...Is there any way to process the ore without using mercury or cyanides...?
• How do I clean up gold encrusted with iron-sulfides?
Market for scheelite concentrates?
Q: Can and should you remove their poles and notice right then and there or should you wait until you have convinced them of their trespass?
• Any suggestions about gold panning in Oregon?
The Bawl Mill • Ask The Experts: Sulfides and fluxes • Legislative and Regulatory Update • Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits • The "Madonna Nugget"—A Weekend Hunt to Remember • The Goldfield Mining District, Nevada—Part II • Sunset Sunbaker • A Prospecting Adventure in Mexico • Critical Minerals: Tungsten • Police Urge Author to End Treasure Hunt • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices