All Articles
How PGMs Affect Assay Beads
September 2001 by Charles L. Butler
Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...Additional articles that might interest you...
Spencer Opal Deposits, Idaho
July 2003
In order to give the reader a better appreciation of some alternative valuable minerals that can be found by the average prospector, we visited Bob Thompson’s Opal Mountain Mine located in Spencer, Idaho.
In order to give the reader a better appreciation of some alternative valuable minerals that can be found by the average prospector, we visited Bob Thompson’s Opal Mountain Mine located in Spencer, Idaho.
The Bawl Mill
February 2008
• The third time is a charm
• Haunted by his past...
• This call will (not) be monitored for security purposes...
• The third time is a charm
• Haunted by his past...
• This call will (not) be monitored for security purposes...
Ask The Experts - Too early to build the crusher?
October 2020
Ask the Experts: gold per ton; improving assay method
May 2012
Q: How much gold do I have per ton and how can I improve my assay method?
Q: How much gold do I have per ton and how can I improve my assay method?
Melman on Gold & Silver
May 2003
Strange, isn’t it, how our vocabulary has been expanding of late. Up until late 2001, the term “Twin Towers” meant either the combination of the Federal Budgetary Deficit and the National Debt or the two outstanding forwards of the NBA’s San Antonio Spurs. Suddenly, the only relevant meaning was the two destroyed buildings in New York City. By mid-2002, most of us who hadn’t given Afghanistan a second thought became familiar with names of towns and regions in that country.
Strange, isn’t it, how our vocabulary has been expanding of late. Up until late 2001, the term “Twin Towers” meant either the combination of the Federal Budgetary Deficit and the National Debt or the two outstanding forwards of the NBA’s San Antonio Spurs. Suddenly, the only relevant meaning was the two destroyed buildings in New York City. By mid-2002, most of us who hadn’t given Afghanistan a second thought became familiar with names of towns and regions in that country.
PLP Update October 2023
October 2023
The Bawl Mill
September 2014
• Just a drop in the (coal) bucket
• Location, Location, Location...
• The "hard drive" for answers...
• Just a drop in the (coal) bucket
• Location, Location, Location...
• The "hard drive" for answers...
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The Bawl Mill
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• Guest Editorial—Vertical Disintegration
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• A Silver Opportunity
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• Picks & Pans: DEF Prospectors Rally Was a Huge Success
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• Our Nugget Shooting Adventure
• Fly Fishing the Mine Tailings/Headwaters of the Clark Fork, Montana
• Company Notes
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