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They cut open a 20-million-year-old coral geode and found a pattern that looked like space
A group of rock hunters finally cut open several pieces of agatized coral that had been sitting around for months. Most of the rocks looked rough on the outside, but the real surprise came when they ...
What starts as a fun Kentucky rockhounding trip quickly turns into a series of absurd crystal reveals. Broken geodes are ...
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 ...
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 ...
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