Geodes are hollow rock formations often with quartz crystals, such as amethyst, inside. Amethyst geodes in Uruguay have been found in cooled lava flows, which date from the original breakup of the ...

'Geode was an idea that was in our minds even before Tippet Rise was established,' says its co-founder Cathy Halstead. The massive 12.5 thousand acre (5,058 hectare) sculpture park, located in the ...