For long-time hunters and novices alike, it’s time to get to crackin’ those crystal-filled geodes as the Annual Geode Family ...

Wherever I wander, I have an eye out for new and different things that might make interesting writing and reading. A trip to the Iowa-Missouri-Illinois tri-state corner last weekend offered up some ...

Amethyst geodes—some stretching 5 m long—dot the ancient lava flows of Uruguay’s Los Catalanes mining area. The geodes contain calcite, colorless quartz, and agate, another quartz mineral. Large ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Discovered in 1999 during mining operations in the Mina Rica (the ...