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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.

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Good questions...from A to Z...

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How does one determine who owns a mining claim?
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Ask the Experts: More suggestions for dealing with metallic trash....


Q: Thanks for the great article in the recent ICMJ [“Metallic Trash—Scourge of the Prospector,” July 2012]...

Ask the Experts: Something for everyone...


Q: Can you suggest some family and dog friendly vacation spots in California where I can also do some sniping?

Ask the Experts: VMS ore


Q: Are there any mills that handle VMS ore?
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Ask the Experts: various mining courses


Q: What classes should one take if planning on majoring in mining engineering or geology?

Ask the Experts: Ionizing mercury


Q: What exactly does "ionizing" mercury mean?

Ask the Experts: gold per ton; improving assay method


Q: How much gold do I have per ton and how can I improve my assay method?
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Q: Can a voltmeter be used to determine the type of metal/mineral present in soil?

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Q: Graphite spray to prevent sticking when using cast iron molds

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Q: ...where would you recommend selling class rings and other scrap gold?
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Ask the Experts: Set up a small portable operation or send the ore to a custom mill?


Q: Set up a small portable operation or send the ore to a custom mill?

Ask the Experts: Who manufactures the diagonal vibrating table?


Q: Who manufactures the diagonal vibrating table?

Ask the Experts: Do "corners" need to be in place on the ground for a claim to be valid?


Q: Do "corners" need to be in place on the ground for a claim to be valid?
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Ask the Experts: Tantalite in an African nation -- is it worth pursuing?


Q: Tantalite in an African nation -- is it worth pursuing?

Ask the Experts - Old workings & tailings: What are my options?


Q: ...It’s a 2,000-acre property that was mined 100 years ago, still has the old workings, tailings, etc. I am looking to recover gold from the old waste/tailings... plus possibly strip mine some of it. What are my options?

Ask the Experts - ...Worth further investigation?


Q: About 158,000 tons of ore is estimated to remain on the property. Worth further investigation?
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Ask the Experts - Processing sulfide ore without mercury or cyanide.


Q: ...Is there any way to process the ore without using mercury or cyanides...?

Ask the Experts—Looking up mining claims on the Internet


Q: Is there an Internet source ... that one can access to review which claims and at which location are the claims that BLM administrators close each year?

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