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Arizona Mines and Minerals Releases New Directory
April 1999 by Staff
The Directory of Active Mines in Arizona-1999, just released by the Arizona Department of Mines and Mineral Resources, reflects the strength and diversity of the Arizona mining industry.Ask The Experts
• Can I get advice on a hard rock property in Calaveras County, California?
Gold, Quartz & Chalcedony—Part II
The specific gravity of chalcedony is 2.58 to 2.64. This is slightly lower than coarsely crystalline quartz because of slight porosity in chalcedony. Being so light, it will easily wash out of a gold pan.
Ask The Experts
Sulfides and oxides—what's the difference between the two?
The Bawl Mill
This missive is making the rounds on the Internet. Author unknown, but must be a miner, builder, or lumber worker...
Identifying the Noble Metals Simple Tests That Work
Using a porcelain evaporating dish, place concentrates or head ore, equal to a tablespoon, in 60cc of aqua regia. Boil almost to dry, then add 10cc HCl (hydrochloric or muratic acid) and heat for a few minutes, and then add 30cc of water and bring to boil. Let cool while the solids are being allowed to settle. Using a pipette...
The Bawl Mill
• No end in sight to tax and spend
• Leadership or sinking ship?
The Art of Finding Coarse Gold—Part III
In the first part of this article, we took a look at the special geology required to form coarse gold. In the second part, we looked at field examples of coarse gold occurrences and the geology of residual placers.
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The Bawl Mill
• Editorial—BLM 43 CFR 3809 Revision Status
• Our Readers Say
• Miner Says Mining Could Return to Boulder
• Onerous New Mining Rules Adopted in Washington State
• U.S. Sued for Failure to Guard Rare Species
• Miner Charged in Death of Downieville Miner
• Senator Warns Against Proposal to Sell Some IMF Gold
• Dry Placers in the Kamma Mountains, Nevada
• Company Notes
• MCS Index Shows Decrease in Mining Costs
• Over the Divide
• Picks & Pans: Confessions of a Small Miner—Part II
• The Saga of Sand Mountain
• Nevada County Feeling Pain of Slumping Mining Industry
• There's Gold in Those Tailings
• Gold at Ragged Top, Arizona
• Increase in Silver Demand by Photography Industry
• Melman on Gold & Silver
• Looking Back
• Mining Stock Quotes and Mineral & Metal Prices
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