All Articles
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...
Looking Back
April 2005
Excerpts from CMJ published 50 years ago this month.
Excerpts from CMJ published 50 years ago this month.
Prospecting for Silver Deposits
August 2015
In some ways, silver is the forgotten precious metal because it straddles both the world of precious metals and jewelry, while having many important industrial applications like a base metal. The price of silver reflects both the precious metal investment demand as well as the industrial demand.
In some ways, silver is the forgotten precious metal because it straddles both the world of precious metals and jewelry, while having many important industrial applications like a base metal. The price of silver reflects both the precious metal investment demand as well as the industrial demand.
The Bawl Mill
October 2007
• Something smells fishy
• Australian government underestimates its youth...
• Membership has its privileges
• Bridge over troubled waters
• Something smells fishy
• Australian government underestimates its youth...
• Membership has its privileges
• Bridge over troubled waters
Lower Prices Bring Layoffs
August 2013
The extensive cost reductions now being put in place are not just a short-term reaction to the recent drop in gold prices...
The extensive cost reductions now being put in place are not just a short-term reaction to the recent drop in gold prices...
New Regulations for Major Precious Metal Dealers
July 2005
The Bush administration, in its latest effort to nab drug lords and terror financiers, will require major dealers in gold, diamonds and other precious metals and gems to set up comprehensive programs to combat money laundering, announced the Treasury Department.
The Bush administration, in its latest effort to nab drug lords and terror financiers, will require major dealers in gold, diamonds and other precious metals and gems to set up comprehensive programs to combat money laundering, announced the Treasury Department.
Ask the Experts - what does MDB&M stand for?
April 2013
Q: What does MDB&M stand for?
Q: What does MDB&M stand for?
The Lost Silver Triangle of the Sierra Madre—Part II
May 2008
Newspaper stories in the spring of 1887 credited Lieutenant Henry O. Flipper with discovering both the long-lost Guaynopa and Tayopa mines. Flipper was in Mexico City in late April and May and a reporter interviewed him.
Newspaper stories in the spring of 1887 credited Lieutenant Henry O. Flipper with discovering both the long-lost Guaynopa and Tayopa mines. Flipper was in Mexico City in late April and May and a reporter interviewed him.
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