So, too, do certain toxic minerals, particularly mercury.
Normally, metallic, tin-white mercury often goes by the name cinnabar and is bright red when found as an inclusion in agate. Another variety is vivid orange. This is myrickite, which may occur in agate or opalite. Agatized material tends to be orange-red, whereas opalized varieties are orange against a black background. Both are so vivid they almost seem synthetic.
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Volcanoes and Emeralds
I've had the privilege to give lectures worldwide at shows, club meetings and retreats. I've also done videos and DVDs including Russian Gem Treasures, shot in Russia and another associated with the Smithsonian about American gem mines.
THE MAGIC OF MARBLE
Sculptors and architects have an abundance of natural stone materials to choose from alabaster, travertine, granite, limestone and soapstone to name a few. But one medium has always stood out - marble. For the last 2,500 years, marble has been chosen for many of the greatest works of sculpture and architecture, from the Parthenon of Classical Greece to Michelangelo's Pietà and Washington D.C.'s Lincoln Memorial.
Designing Jewelry Based on the Healing Properties of Colors
The Silver of POTOSI
Triumph, Tragedy & El Tío
CURVED RIDGES SHAPED TIPS
Complex carving with curved ridges and shaped tips can be daunting.
Many of the digging locations for this marcasite are on private property. It was allowed at one point to collect with the owner's permission, but a few rockhounds ruined it for the rest by trespassing, trampling newly-grown crops, and opening and closing gates not allowing cattle to get to their water sources. As a result, this material hasn’t been dug for a few decades.”
From Gems to Fossils, Dig Them at Home
ON THE ROAD WITH THAT CAMPING COUPLE
The Pleasures and Perils of Competitive Exhibiting
Competitive exhibiting offers lots of opportunities to earn awards through venues like club shows, county fairs, trade shows and Federation shows. Since 1995, I've been involved in competitive exhibiting from three perspectives: administering, judging and exhibiting. Here are my suggestions for best practices.
ULTIMATE Gift Guide FOR ROCKHOUNDS
What to Buy for the Rock Lover in Your Life