Northern Uruguay is home to one of the largest amethyst deposits in the world – but their formation has long been a mystery. Using cutting-edge techniques, researchers are unraveling their ...

The 2.5 tons Empress of Uruguay is slightly less impressive after a tourist pinched a piece of the world's largest amethyst on show in Queensland, Australia. The three-meter tall amethyst geode ...

Göttingen University researchers in front of a giant amethyst geode in Uruguay. Geodes like this have been found in cooled lava flows dating from the original breakup of the supercontinent ...

Some of the world's largest amethyst geodes come out of Artigas, Uruguay. The earth beneath this region is uniquely suited to producing amethyst. But other than size, what qualities do miners look ...

northern Uruguay. Along with Ametista do Sul in southern Brazil, these regions are the world’s leading mining districts for gems which come from volcanic lava, such as amethyst and agate geodes.