All Articles
San Diego County Tourmaline
June 2001 by Frank Lorey III
San Diego County, California, has long been considered the finest source of pink tourmaline in the world. The Pala, Mesa Grande, Rincon, and Ramona districts in the northern portion of the county have produced tourmaline, kunzite, and other gems in great quantities, much of it jewelry and museum-quality specimens.Additional articles that might interest you...
Commercial Placer Mining With Jigs
August 2010
During the upward stroke, water is pushed up through the shot layer causing it to open up and lifting the gravel particles above. The heavier particles settle faster based on Stokes law, and move down into the shot bed layer, while the lighter...
During the upward stroke, water is pushed up through the shot layer causing it to open up and lifting the gravel particles above. The heavier particles settle faster based on Stokes law, and move down into the shot bed layer, while the lighter...
Legislative and Regulatory Update
March 2014
• Idaho challenges EPA regulations
• California suction gold dredging
• Idaho challenges EPA regulations
• California suction gold dredging
Melman on Gold & Silver
April 2015
…the general investment community has turned away from mining shares over the past three years and moved whole-heartedly into conventional investments.
…the general investment community has turned away from mining shares over the past three years and moved whole-heartedly into conventional investments.
The Trail of ‘98
October 2008
On June 16, 1897, the steamer Excelsior cruised into San Francisco Bay, completing its long voyage from Alaska. While a ship arriving from the far north was not a particularly unusual event, this one heralded news of something truly big.
On June 16, 1897, the steamer Excelsior cruised into San Francisco Bay, completing its long voyage from Alaska. While a ship arriving from the far north was not a particularly unusual event, this one heralded news of something truly big.
Shortage of Mining Engineers Projected
February 2005
As decade-high gold and silver prices spark a renewed interest in mining in the West, there are few mining education programs and fewer students earning mining engineering degrees due to two decades of decline in the US mining industry.
As decade-high gold and silver prices spark a renewed interest in mining in the West, there are few mining education programs and fewer students earning mining engineering degrees due to two decades of decline in the US mining industry.
Natural Gold Alloys
March 2014
Natural gold is never 100% pure; all natural nuggets contain at least some impurities. We're going to take a look at just what some of those impurities might be.
Natural gold is never 100% pure; all natural nuggets contain at least some impurities. We're going to take a look at just what some of those impurities might be.
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