Ask The Experts
Ask The Experts—Separating platinum from sands using bubbles
October 2011 by Chris Ralph
I am trying to find any information about using bubbles to separate platinum from sands and small particles. I think it has to have a surfactant in the process. Do you know of this bubble tech?Ask The Experts - Is this gold?
The Portable XRF Gun

Ask The Experts: What is a Spanish needle?
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: VMS ore
Q: Are there any mills that handle VMS ore?
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NOI or POO for small backhoe
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What are these rocks?
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