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California's Original Sixteen to One Mine
May 2005 by Reggie Gould
The Sixteen to One mine is located in the little town of Alleghany, 40 miles from Nevada City, in Northern California. It has less than sixty residents. The town sits at an altitude of 4,500 feet. In 1885, the town was named by a group of miners...
Critical Minerals: Titanium
The metal is expensive, not because it is rare but because of the expense to produce and work it. The minerals mined for titanium are all oxides, unlike many base metals that are mostly mined as sulfide minerals.
Diamonds in the Rough in Montana
The bright green rocks jutting through the prairie soil were hard to miss, but Tom Charlton still couldn’t believe his eyes. It was kimberlite, the molten rock in which diamonds are found, and preliminary tests had yielded a microscopic diamond.
The Chinese Experience
The Weaverville War at the California Mines
The Bawl Mill
• Hotline turns up the heat
• Mad Men arrested for living up to their name
Ask the Experts
Centrifugal bowls versus jigs
Prospector's Guide to Rock Breaking and Blasting
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
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The Bawl Mill
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