Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

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 ...

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 ...

Wherever I wander, I have an eye out for new and different things that might make interesting writing and reading. A trip to the Iowa-Missouri-Illinois tri-state corner last weekend offered up some ...

Geode is a type of sedimentary and volcanic rock that is hollow, vaguely circular rock, in which masses of mineral matter (which may include crystals) are sequestered. The term 'Geodes' was derived ...