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: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.
Q: Can a voltmeter be used to determine the type of metal/mineral present in soil?
I have a highbanker, and I am considering adding a suction piece to make it a combo.
Q: What are the advantages or disadvantages of hand crank vs. battery power vs. blower? And your preference?
Q: How do I get gold out of a saturated solution of salt with nitric acid?
Q: Who manufactures the diagonal vibrating table?
Q: I’ve thought about renting an XRF gun with gold specific software to use for exploration this spring.
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