History & Geology
All About Chalcopyrite
March 2017 by Chris Ralph
…there are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then through the effects of weathering are changed into other minerals like malachite, cuprite and chrysocolla.
Additional articles that might interest you...
When Legends Were Made and Fortunes Found
August 2011
Sylvester Smith and his younger brother Nathan were among this group who rode and led their Indian ponies, while climbing the rugged Salmon River breaks and rockhewn mountains, looking for a path that would lead them up and over the uncharted wilderness.
Sylvester Smith and his younger brother Nathan were among this group who rode and led their Indian ponies, while climbing the rugged Salmon River breaks and rockhewn mountains, looking for a path that would lead them up and over the uncharted wilderness.
Over the Divide: John A. Miscovich
October 2014
Mining “giant” John A. Miscovich died August 22, 2014, at the age of 96. He was the well-known inventor of the “Intelligiant” water cannon.
Mining “giant” John A. Miscovich died August 22, 2014, at the age of 96. He was the well-known inventor of the “Intelligiant” water cannon.
Gold Rush Continues in Africa
March 2015
…some miners are doing exceptionally well… with a few obtaining amounts estimated in the millions of dollars.
…some miners are doing exceptionally well… with a few obtaining amounts estimated in the millions of dollars.
Ask The Experts
June 2015
Sulfides and oxides—what's the difference between the two?
Sulfides and oxides—what's the difference between the two?
Gold From Cemented Gravels
November 2011
The truth is that cemented gravels are really not all that complex. There is no mystery of how gold grew there or somehow wormed its way into these solid gravels.
The truth is that cemented gravels are really not all that complex. There is no mystery of how gold grew there or somehow wormed its way into these solid gravels.
Surface Indications Of Quartz Adularia Epithermal Deposits
May 2015
I am going to keep to the basics of surface indications and visual clues in the rocks and minerals themselves that help me find gold-bearing veins in this classification of deposits.
I am going to keep to the basics of surface indications and visual clues in the rocks and minerals themselves that help me find gold-bearing veins in this classification of deposits.
Our Readers Say
August 1999
• "...just about more than I can stand."
• "I hope you can answer my number one question..."
• "...I still go out and mine a little at my old stompin' grounds in Siskiyou County..."
• "...New Prospecting Club in the Southeast."
• "...9 ounces...in two weeks."
• "...It's no secret..."
• "...just about more than I can stand."
• "I hope you can answer my number one question..."
• "...I still go out and mine a little at my old stompin' grounds in Siskiyou County..."
• "...New Prospecting Club in the Southeast."
• "...9 ounces...in two weeks."
• "...It's no secret..."
Subscription Required:
The Bawl Mill
• Ask The Experts: Can you review the differences in dry washers?
• Ask The Experts: Will this detector work for me?
• Ask The Experts: Nickel assays
• Ask The Experts: Potential for developing magnesite deposit
• Our Readers Say
• Selectable Frequency vs Multi Frequency Detectors
• Detecting Alluvial Bench Deposits -- Pt II
• The Goldfield Mining District -- Then and Now
• Nevada's Lithium Boom
• Old Patch, New Detector
• Over The Divide: James H Harrand & Daniel Yesberger
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
