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How To Locate Diamonds
July 2008 by W. Dan Hausel
How to locate diamonds: This article focuses on the principal host rock for diamond and describes some gemstones (and kimberlitic indicator minerals) typically found with diamond.
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Legislative and Regulatory Update
October 2005
• Roadless Rule back in court again
• New mining regulations considered in Europe
• PLP in court on behalf of miners
• Karuk Tribe to appeal
• NEPA rewrite drive gets boost from Katrina
• Roadless Rule back in court again
• New mining regulations considered in Europe
• PLP in court on behalf of miners
• Karuk Tribe to appeal
• NEPA rewrite drive gets boost from Katrina
Legislative and Regulatory Update
May 2019
- Bernhardt confirmed
- State of Montana to appeal Rock Creek decision
House Chair Requests Records on Forest Decision
December 1999
House Resources Chairman Don Young is asking the White House and Agriculture Department for records related to President Clinton's decision to place 40 million acres of remote, federal forest land off-limits for development.
House Resources Chairman Don Young is asking the White House and Agriculture Department for records related to President Clinton's decision to place 40 million acres of remote, federal forest land off-limits for development.
Looking Back
July 2000
Excerpts from CMJ published 50 years ago this month.
Excerpts from CMJ published 50 years ago this month.
PGMs in California
September 2002
The occurrence of platinum-group metals (PGMs) is rather widespread in California in placer deposits, but they are not of commercial interest as things now stand.
The occurrence of platinum-group metals (PGMs) is rather widespread in California in placer deposits, but they are not of commercial interest as things now stand.
Corralling Those Pesky Platinum Group Metals
June 2005
Some assay beads disappear, collapse, hide under the surface, or spread out flat while being cupelled, just as the last tiny bit of liquid litharge is driven off. This is especially true of platinum, iridium and osmium, when attempting to re-bead the filtered residue from a parted bead.
Some assay beads disappear, collapse, hide under the surface, or spread out flat while being cupelled, just as the last tiny bit of liquid litharge is driven off. This is especially true of platinum, iridium and osmium, when attempting to re-bead the filtered residue from a parted bead.
Selecting a Gold Recovery System
March 2001
Tabling and jigging are two relatively inexpensive methods of recovering the “free particle values” from the noble metal ores. However, not all ores contain their values as free particles. In fact, many gold ores contain appreciable amounts of “metallic gold salts,” some of which readily dissolve in the system water and continue to migrate right along with it.
Tabling and jigging are two relatively inexpensive methods of recovering the “free particle values” from the noble metal ores. However, not all ores contain their values as free particles. In fact, many gold ores contain appreciable amounts of “metallic gold salts,” some of which readily dissolve in the system water and continue to migrate right along with it.
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The Bawl Mill
• The Lost Silver Triangle of the Sierra Madre—Conclusion: Tayopa, Guaynopa, and Guaynopita
• The Greenwood Gold Project
• Miners Go To Work In Washington
• Natural Crystalline Gold
• The Vore Mine
• Tools of the Modern Prospector: The GPS
• Whitehall Mine Foregoing Closure
• Work Begins At Rock Creek Mine
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• The National Mining Hall of Fame to Induct Four
• Looking Back
