Every rockhound dreams of days like this! These are the greatest pieces I’ve ever uncovered, featuring flawless agates, vibrant amethyst, UV-reactive yooperlites, and perfect geodes cracked open to ...

Amethyst geodes in Uruguay have been found in cooled lava flows, which date from the original breakup of the supercontinent Gondwana around 134 million years ago. However, their formation has ...