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Oregon Thundereggs
By Antoinette Rahn
One look at the inside of a thunderegg, and it’s easy to understand the wild interest in these rocks with agate-filled nodules....
How Might the Discovery of More Liquid on Mars Impact Geology?
By Jim Brace-Thompson
Many Earth and planetary scientists now agree that in the far distant past (as in billions of years ago), Mars was a...
Oklahoma Trilobite Is Small in Size, But Big in Ornamentation
By Joseph "PaleoJoe" Kchodl
The KETTNERASPIS williamsi is a small but highly ornamented trilobite. Very broad and wide this trilobite has long spines, and was...
A Couple That Cuts Together Stays Together
By Antoinette Rahn
Azur and Jesse McHugh
www.azurz.com
(The McHugh's are artists featured in the Tools of the Trade profile sponsored by Cutting Edge Supply Co.)
When asked...
Issue Highlights: January 2021
Below is a snapshot of some of the topics and interests you can expect to see in the pages of the January 2021 issue...
Ammolite — Beautiful and Magical
By Jim Brace-Thompson
Although most gemstones come from inorganic minerals, a class of “organic gems” consists of materials created by organisms (plants and animals) and...
Mining and Veteran Connections
In recognition of Veterans Day, the November issue of Rock & Gem contains articles highlighting individuals in the mineralogy, lapidary, and geology community whose...
ZACANTHOIDES idahoensis — A Predatory Carnivore
By Joseph "PaleoJoe" Kchodl
The featured fossil, a ZACANTHOIDES idahoensis, is a very spiny Cambrian trilobite with a wide cephalon that ends in long genal...
Club Spotlight: Dallas Gem and Mineral Society
By Antoinette Rahn
Things in the world may have changed a lot since the Dallas Gem and Mineral Society (DGMS) formed in 1956, but many...
Perplexing Pterodactyls — Fossils Reveal Feathers or No?
By Jim Brace-Thompson
For a couple of decades now, feathered dinosaurs have been all the rage. This interest follows on discoveries of spectacularly preserved ancient...
