All Articles
Spanish Silver in Arizona
October 2001 by Edgar B. Heylmun, PhD
When Spaniards entered what is now Arizona, they encountered diggings made by Opata Indians. The Opata Indians, who now live and mine in the northeastern part of the state of Sonora, Mexico, were one of the few Indian tribes that was...
Additional articles that might interest you...
Mining Stock Quotes and Mineral & Metal Prices
January 2018
Mining Stock Quotes, Mineral & Metal Prices
March 2009
Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board
April 2013
Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.
Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.
Detectors: Past, Present and Future
June 2016
Detectors were invented long before I was born, but it was in the 1960s when they started to become an item popular enough to power a fledgling industry. The key development was miniature transistor technology replacing the old fashioned tube technology of the 1950s, making lightweight, affordable detectors possible.
Detectors were invented long before I was born, but it was in the 1960s when they started to become an item popular enough to power a fledgling industry. The key development was miniature transistor technology replacing the old fashioned tube technology of the 1950s, making lightweight, affordable detectors possible.
Wyoming's Billion Dollar Nugget—The Trilogy Ends
July 2011
With eight loads processed, a pumpkin-size rock fell into the hopper, stopping the whole operation until I could lift it out.
With eight loads processed, a pumpkin-size rock fell into the hopper, stopping the whole operation until I could lift it out.
Extracting & Smelting Your Gold
February 2013
Unfortunately, not all the gold that we prospectors find is pretty, or appealing to the eyes. They are not all nice, bright, shiny nuggets with lots of character that carry high collector value.
Unfortunately, not all the gold that we prospectors find is pretty, or appealing to the eyes. They are not all nice, bright, shiny nuggets with lots of character that carry high collector value.
Is There A Gold Shortage?
October 2008
Coin and bullion dealers confirmed in mid-August that the US Mint was refusing orders from dealers.
Coin and bullion dealers confirmed in mid-August that the US Mint was refusing orders from dealers.
Subscription Required:
The Bawl Mill
• Our Readers Say:
• Placer & Lode Gold Deposits
• Hog Mountain Mining, Past and Future
• Picks & Pans: Dredging Costa Rica
• Gold in Texas
• The Goldhill Mining District
• New Arsenic Study Supports Tougher Standards
• Miners Resume Search for Platinum Near Platinum
• Discoloring Assay Beads
• Tons of Gold Buried Under World Trade Center
• Gold Rush Ship Uncovered in San Francisco
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
• The Financial Repercussions of the WTC Tragedy
• Permit Appears Likely for Rock Creek Mine
