Ask The Experts
Ask The Experts—Using classifiers
December 2010 by Chris Ralph
Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.Ask The Experts: Can you review the differences in dry washers?
Q: What are the advantages or disadvantages of hand crank vs. battery power vs. blower? And your preference?
Ask the Experts: What type of wetsuit do I need?
Q: Since the weather in California is not as nasty as it is in Alaska, would it be advisable to wear the same setups as he wrote about?
The Portable XRF Gun
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
• Are these gold amounts large enough to interest a mining company?
Ask The Experts—Difference between a Geiger counter and scintillator
Would you explain the difference between a Geiger counter and a scintillator and how they operate in uranium prospecting?
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