All Articles
Fire Agate in Arizona
June 2002 by Edgar B. Heylmun, PhD
Agate, a banded form of chalcedony (cryptocrystalline quartz), has been used as a gemstone for over 7,000 years. Romans cut and polished agate, and this practice was taken to new heights in Germany in the 16th century.Additional articles that might interest you...
Bedrock
March 2014
I am going to break bedrock down a bit and explain my view of the varying scenarios I come across in the field.
I am going to break bedrock down a bit and explain my view of the varying scenarios I come across in the field.
Prospecting for Hardrock Gold - Part II
April 2010
I finally managed to return to this exploration effort. There was still snow on the ground on the north side of the mountain where I started, but I knew the south side was likely melted and gold fever bit too hard to stay inside any longer.
I finally managed to return to this exploration effort. There was still snow on the ground on the north side of the mountain where I started, but I knew the south side was likely melted and gold fever bit too hard to stay inside any longer.
Silver’s Shine is Back
June 2007
As a precious metal, silver doesn’t have the allure of gold. As an investment, it’s not as hip as Google. But dowdy old silver is suddenly chic. Silver prices are at their highest in more than 25 years, and mining companies are riding an economic boom.
As a precious metal, silver doesn’t have the allure of gold. As an investment, it’s not as hip as Google. But dowdy old silver is suddenly chic. Silver prices are at their highest in more than 25 years, and mining companies are riding an economic boom.
The Bawl Mill
October 2010
• A third political party is born
• A third political party is born
Feinstein Pushes for Million-Acre Land Grab
November 2015
Met by jeers and cheers from more than 1,000 people, US Senator Diane Feinstein (D-CA) made another pitch to create three new national monuments in the deserts of southern California recently.
Met by jeers and cheers from more than 1,000 people, US Senator Diane Feinstein (D-CA) made another pitch to create three new national monuments in the deserts of southern California recently.
Ask The Experts—Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold?
May 2011
Q: Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold? Or do the two go hand-in-hand?
Q: Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold? Or do the two go hand-in-hand?
Understanding and Prospecting Benches
September 2011
The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.
The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.
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The Bawl Mill
• ICMJ Elected Prospecting Magazine of 2002
• Mining Investment—Or Fraud?
• Gold in Suriname
• Golden Age of Gold Dredges
• Prospecting With Limited Equipment
• Looking Back
• Beryllium in Utah
• Company Notes
• Picks & Pans: The Gold of "Eldorado Canyon"—Mariposa County, California
• The Canton Lead
• NAS Agrees to Review Superfund Science
• Tight Budgets Force Forest Service to Cut Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
