Lovely day for a bit of rockhounding. Found agates, geodes, and the mild realization that we’re holding something older than civilization. Not bad for a river we nearly ignored.

In this video my friends PaleoCris, and Rick (digdivediscover) team up with me to find Agatized Coral Geodes in a river in Georgia! This trip was nostalgic for me, because I grew up about 45 minutes ...

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 ...

Göttingen University researcher Fiorella Arduin Rode working in open pit mine of the study area, Los Catalanes mining district, northern Uruguay. Along with Ametista do Sul in southern Brazil, these ...