Ask The Experts
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?
Ask the Experts: Who manufactures the diagonal vibrating table?
Q: Who manufactures the diagonal vibrating table?
Ask The Experts - How do I work this glacial deposit?
Ask the Experts
Can I treat a sample with muriatic acid?
Ask The Experts
Gold in clastic black shale
Ask The Experts - Is this gold?
Ask The Experts
Sulfides and oxides—what's the difference between the two?
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