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 ...

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. Amethyst is a ...

It seems there isn’t much this man can’t do. Veteran outback truckie Steve Grahame, 72, was recently called upon to help unearth a 22.5-tonne amethyst cluster in the WA’s Pilbara region. It’s the ...

World-class amethyst-agate geodes from Los Catalanes, Northern Uruguay: genetic implications from fluid inclusions and stable isotopes. Mineralium Deposita , 2024; DOI: 10.1007/s00126-024-01310-2 ...