In a recent article in Miner Deposita, researchers presented a comprehensive study of the amethyst and agate geodes in the Los Catalanes Gemmological District of Northern Uruguay. This region is ...

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 ...

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 ...

Wire wrapping, geode cracking, and a collection of shiny rocks and gems will be on display for all to see at the 45th annual Gem and Mineral Show. The Indian Mounds Rock and Mineral Club will have ...

On a visit to Tucson, relatives took me to a gem and mineral show where we saw a collection of geodes. Ordinary on the outside; beautiful on the inside. Will you please tell us how they are formed and ...

TYLER, Texas (KLTV) - If you’re looking for something solid to do this weekend, well we have something for you. It doesn’t get much more solid than the East Texas Gem and Mineral Show. This is truly a ...