Guanajuato Silver, Mexico

August 1999 by Edgar B. Heylmun, PhD

Getting Skunked, but Having Fun!

January 2023

Encouraging the New Prospector

First Load of Concentrate Leaves Reopened Ruth Mine

November 2004
Five years after depressed copper prices forced the Robinson mine to shut down, the first truckload of concentrate pulled out in what its new owner sees as a renewal of the facility and Ely-area residents hope is a rebirth of the region.

Identifying the Noble Metals Simple Tests That Work

May 2006
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

May 2002
• California Governor buys more votes
• The Bank of the EPA
• Just put it on my card

All About Lead Minerals, Silver and Gold

May 2020

Many miners know that lead is very commonly associated with silver values, but the truth is that it is also associated with gold values in many locations as well.

More Tips for Evaluating Ores

July 2007
Tabling and jigging are two relatively inexpensive methods for recovering the “free particle values” from the noble metal ores. However, not all ores contain their values as free particles. In fact, many ores contain appreciable amounts of “metallic salts” that readily dissolve in one’s system water and continue to migrate right along with this water.

Summertime Gold! Northern & Southern California

September 2023

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