Crack open an unassuming stone, and you might just uncover a little conclave of crystals within. Their walls are glittering with quartz, amethyst, or calcite, protected by a hard shell that was shaped ...

People view the 12-foot tall amethyst geode from Uruguay hosted at the American Museum of Natural History in New York. Thanks to geological surveys and detailed chemical analysis, a team of ...

What starts as a fun Kentucky rockhounding trip quickly turns into a series of absurd crystal reveals. Broken geodes are already scattered everywhere, but the real payoff comes when they start ...

Dig into western Illinois and uncover crystal-filled geodes hiding beneath the soil at this muddy, hands-on adventure near ...

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 ...

Taken by themselves, geodes are gorgeous, with the insides lined with crystals that add a sense of beauty and wonder to the rocks, and they become even more amazing when they are dinosaur eggs, as was ...

Researchers found this hand ax, which appears to have been shaped around a geological feature imprint. R. Barkai et al., Tel Aviv, 2026 under CC BY-NC-ND 4.0 Many modern humans love collecting unique ...