All Articles
Picks & Pans: Mining Tungsten Ore—A Case History
May 2002 by Dr. Ralph E. Pray
In 1977, when the price of tungsten hit one of its highs, three of us formed U.S. Western Mines to look for scheelite, the mineral ore of tungsten. Union Carbide Corporation was purchasing raw tungsten ore at...
Additional articles that might interest you...
Small-Scale Mining with a Dozer and Detectors
December 2007
Even the best of metal detectors are only capable of seeing a certain distance down into the sand, gravel and rock of a placer deposit. Once all the gold that can be reasonably seen by a metal detector has been harvested, it can be difficult to...
Even the best of metal detectors are only capable of seeing a certain distance down into the sand, gravel and rock of a placer deposit. Once all the gold that can be reasonably seen by a metal detector has been harvested, it can be difficult to...
Melman on Gold & Silver
November 1999
Once you have had a chance to look at our charts and quotes for this issue, I have one bit of advice. "Don't go running off to see your optometrist!"
Once you have had a chance to look at our charts and quotes for this issue, I have one bit of advice. "Don't go running off to see your optometrist!"
Legislative and Regulatory Update
November 2005
• ESA reform, finally
• BLM finalizes another fee hike
• ESA reform, finally
• BLM finalizes another fee hike
Ask The Experts—Amalgamation
January 2011
Q: Exactly how does amalgamation work? Does it “melt” the gold (or copper, or silver, etc.) and form an alloy? If one leaves a piece of gold in mercury, will the entire sample become an amalgam (combination) of gold and mercury? Or does it only affect the surface...
Q: Exactly how does amalgamation work? Does it “melt” the gold (or copper, or silver, etc.) and form an alloy? If one leaves a piece of gold in mercury, will the entire sample become an amalgam (combination) of gold and mercury? Or does it only affect the surface...
Looking Back
June 2003
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The Bawl Mill
January 2004
• Expensive bags will be around for a long time
• Year-end spending frenzy begins
• Illinois goes to the Democrats
• Expensive bags will be around for a long time
• Year-end spending frenzy begins
• Illinois goes to the Democrats
The Bawl Mill
October 2002
• No end in sight to tax and spend
• Leadership or sinking ship?
• No end in sight to tax and spend
• Leadership or sinking ship?
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• Our Readers Say
• California Wilderness Coalition and The Nature Conservancy Recruit Government Employees to Carry Out Huge Land Grab
• Drywashing Rules Clarified
• Mineralized Calderas in Colorado
• The Keystone Gold-Copper District, Medicine Bow Mountains, Southeastern Wyoming
• Gold in Oregon
• Aussie Gold—A Look at the Northern Territory
• The Phoenix Gold Mine: A Brief History
• Calico Mine
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
• Melman on Gold & Silver
