They spend most of the trip fighting rocky shoals, freezing water, snakes, and one disappointing stop after another. For a long time, all the river gives them is solid coral and small hints that the ...

Hand holding a purple geode in a green garden - FotoHelin/Shutterstock This guide highlights accessible, legal locations where enthusiasts can safely hunt for geodes and geode-like formations and take ...

Real geodes are handball-sized, hollow rocks that start out as bubbles in volcanic or sedimentary rock. Only when these inconspicuous round rocks are split in half by a geologist, do we get a chance ...

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 ...