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Placer Gemstones
December 2001 by Edgar B. Heylmun, PhD
Only the so-called “precious gems” will be considered in this article. They are diamond, ruby, sapphire, and emerald. A “gem” must be rare, hard, and durable, and possess a unique color or quality in order to be classified as a gem.Additional articles that might interest you...
Woman Gets 90 Months in Mining Fraud Case
March 2007
A Nevada woman was sentenced to more than seven years in federal prison for her role in an investment scheme involving claims that she could extract precious metals from volcanic cinders, officials said.
A Nevada woman was sentenced to more than seven years in federal prison for her role in an investment scheme involving claims that she could extract precious metals from volcanic cinders, officials said.
How PGMs Affect Assay Beads
September 2001
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...
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...
Mining Stock Quotes and Mineral & Metal Prices
August 2017
The Bawl Mill
November 2008
• A true alarm clock
• No better time to roast a pig
• By the numbers…
• A true alarm clock
• No better time to roast a pig
• By the numbers…
Chavez Eyes Venezuela’s Largest Gold Mine
December 2008
Venezuela announced plans to take over the nation’s largest gold mine, operated by Canada’s Crystallex International Corp., as President Hugo Chavez gradually brings mining operations under state control.
Venezuela announced plans to take over the nation’s largest gold mine, operated by Canada’s Crystallex International Corp., as President Hugo Chavez gradually brings mining operations under state control.
Melman on Gold & Silver
June 2004
It’s amazing how a few pictures could place an entire Presidential Administration on the defensive, yet that is exactly what has happened during the past month with the publication of the photos out of Iraq, which presumably show American soldiers engaging in acts of torture, humiliation and ridicule inflicted on their Iraqi prisoners.
It’s amazing how a few pictures could place an entire Presidential Administration on the defensive, yet that is exactly what has happened during the past month with the publication of the photos out of Iraq, which presumably show American soldiers engaging in acts of torture, humiliation and ridicule inflicted on their Iraqi prisoners.
Reese River Silver Mining District, Nevada
March 2014
The strike and the dip of the veins can be broken down into two categories: veins in the eastern area and along Lander Hill, and the veins in the southwestern portion of the district.
The strike and the dip of the veins can be broken down into two categories: veins in the eastern area and along Lander Hill, and the veins in the southwestern portion of the district.
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