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...
Ask the Experts
September 2007
Q: I would like to know the following on the metal nickel:
• Where is it mined?
• Why is the unit price so large—is this for a metric ton?
Q: I would like to know the following on the metal nickel:
• Where is it mined?
• Why is the unit price so large—is this for a metric ton?
Collecting Garnets in Wyoming
April 2000
In Wyoming, garnets are often common where aluminum-rich (micaceous) rocks have been highly metamorphosed. Such rocks are recognized by abundant black (biotite), silver (muscovite), or green (chlorite) mica with periodic grains of red garnet.
In Wyoming, garnets are often common where aluminum-rich (micaceous) rocks have been highly metamorphosed. Such rocks are recognized by abundant black (biotite), silver (muscovite), or green (chlorite) mica with periodic grains of red garnet.
From Vietnam to Wedding Bands
February 2017
It’s a common symptom of gold fever for miners to be very hesitant to let go of gold they’ve found or even have it made into jewelry. I confess, I suffer from the same incurable disease!
It’s a common symptom of gold fever for miners to be very hesitant to let go of gold they’ve found or even have it made into jewelry. I confess, I suffer from the same incurable disease!
Prospecting With Color
December 2000
Perhaps no one factor has caused more confusion in the search for ore than the attempt to use color as a guide to prospecting. Yet, there is a reason for every color seen in rocks, so it deserves to be noted.
Perhaps no one factor has caused more confusion in the search for ore than the attempt to use color as a guide to prospecting. Yet, there is a reason for every color seen in rocks, so it deserves to be noted.
Sons of Gwalia & Herbert Hoover
July 2002
The Sons of Gwalia mine is situated in the Eastern Goldfields region of Western Australia. It was found by a group of Welsh prospectors in 1896. Gwalia simply means Wales; hence, it was Sons of Gwalia who found the mine.
The Sons of Gwalia mine is situated in the Eastern Goldfields region of Western Australia. It was found by a group of Welsh prospectors in 1896. Gwalia simply means Wales; hence, it was Sons of Gwalia who found the mine.
Legislative and Regulatory Update
March 2004
• GAO opinion contradicts Norton-Leavitt road deal
• Cubin wages battle over public lands decisions
• Washington State rivers are open, work continues
• Recent FWS habitat, endangered or threatened proposals
• GAO opinion contradicts Norton-Leavitt road deal
• Cubin wages battle over public lands decisions
• Washington State rivers are open, work continues
• Recent FWS habitat, endangered or threatened proposals
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The Bawl Mill
• A True Endangered Species
• Guest Editorial—Vertical Disintegration
• USGS Reports Increase of Imported Minerals
• The San Juan Mountains, Colorado
• A Silver Opportunity
• Gold in Virginia
• Picks & Pans: DEF Prospectors Rally Was a Huge Success
• News From GATA
• Our Nugget Shooting Adventure
• Fly Fishing the Mine Tailings/Headwaters of the Clark Fork, Montana
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
