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 ...

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 ...

The three-meter tall amethyst geode - a hollow rock filled with amethyst crystals - is the main attraction at the Crystal Caves at Atherton, southwest of Cairns. But it's now missing a bit after a ...

In a recent article in Miner Deposita, researchers presented a comprehensive study of the amethyst and agate geodes in the Los Catalanes Gemmological District of Northern Uruguay. This region is ...