Fire Agate in Arizona
June 2002 by Edgar B. Heylmun, PhDAgate, a banded form of chalcedony (cryptocrystalline quartz), has been used as a gemstone for over 7,000 years. Romans cut and polished agate, and this practice was taken to new heights in Germany in the 16th century.
• Re: Comments needed for Bull Trout critical habitat (May 2004)
• Re: Recommended reading
…these two guys are part of the new hi-tech generation who review new technologies and are always looking for new ways to apply them in innovative fields!
U.S. Forest Service officials are drawing criticism from environmentalists for reopening some back-country roads that had been closed to protect threatened grizzly bears.
I have made my living gold dredging for the past 25 years, and I am often asked how someone should choose their first, or next dredge. There are many considerations, and I hope to save you time and aggravation by sharing with you what I have learned.
• Washington State copies California's wayward regulations
PLF has been hard at work improving our Endangered Species Act Reform Project (ESARP), which is why you haven’t heard from us over the past few months.
The Bawl Mill • ICMJ Elected Prospecting Magazine of 2002 • Mining Investment—Or Fraud? • Gold in Suriname • Golden Age of Gold Dredges • Prospecting With Limited Equipment • Looking Back • Beryllium in Utah • Company Notes • Picks & Pans: The Gold of "Eldorado Canyon"—Mariposa County, California • The Canton Lead • NAS Agrees to Review Superfund Science • Tight Budgets Force Forest Service to Cut Back • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices