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Earthquakes Persist in the South Pacific
By Jim Brace-Thompson
In the April issue of Rock & Gem, I wrote of a magnitude 7.7 earthquake in the South Pacific that set off...
What’s Your Favorite Rock Shop? Tell Us All About It!
With rock shops serving as an important cornerstone of our community, we’re asking you to share some information and a nomination, if you will,...
Catching Clues to Invasion of Land Courtesy of Fish
By Jim Brace-Thompson
One big step in the history of life on Earth involved the transition from water to land by four-limbed vertebrate critters, or...
Trilobite of the Week: CYPHASPIS carrolli
By Joseph "PaleoJoe" Kchodl
CYPHASPIS carrolli is a rare and spectacular trilobite. Found in the Haragan Formation in Coal County, Oklahoma, it is a recent...
Horse history originated where?!
By Jim Brace-Thompson
The horse family's prehistory has been a fond subject for paleontologists and evolutionary scientists going way back. They started out as multi-toed...
Exploring the Brilliant, Beautiful, and Brittle Natrolite
By Antoinette Rahn
Natrolite is an example of a brilliant and brittle mineral. It may be a "handle with care" and a common type of...
The Climate Effect of Geomagnetic Field Reversal on Earth
By Jim Brace-Thompson
Every now and again in a more-or-less regular cycle, Earth’s magnetic field flips in what is called a “polarity switch.” What was...
Bruneau-Pattern Jasper – Multi-State Discoveries
Editor’s Note: This feature by Eugene Mueller, founder and co-owner of The Gem Shop in Cedarburg, Wisconsin, first appeared in Rock & Gem in...
The Embarrassing, Boring Middle Age of Earth History
By Jim Brace-Thompson
When my kids were teenagers and I was middle-aged, they determined I was not only embarrassing (arriving at school grounds to pick...
Making Memories of a Rockhounding Lifetime
Editor’s Note: As part of our year-long 50th anniversary, we invite readers to share one of your most special memories related to rockhounding and...
