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 ...

“It was surprising to find these very low temperatures,” Arduin Rode says. Researchers studying amethyst geode formation in Brazil’s lava flows have proposed temperatures below 100 ° ...

People view the 12-foot tall amethyst geode from Uruguay hosted at the American Museum of Natural ... [+] History in New York. Thanks to geological surveys and detailed chemical analysis ...

Northern Uruguay is home to one of the largest amethyst deposits in the world – but their formation has long been a mystery.

These scientists are trying to uncover the mysteries behind the formation of amethyst geodes, found in ancient lava flows. Amethyst and calcite geode from the Los Catalanes district, ready for sale.

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 ...

You will usually find them in underwater caves or trapped structures in a triple layer of smooth basalt, calcite, and the amethyst geode. Use chunkbase to find the concentration of amethyst geodes ...

Geneticists are still on the hunt for an explanation. In this age of modern domestication, why are the largest dog breeds up to 40 times bigger than the smallest? While the answer remains unclear ...

What is the biggest challenge currently facing leaders? I posed this open-ended question to six international executive coaches. They should know—after all, they spend their days helping leaders ...

From ecosystem change and soil quality to hydrology and natural hazards, Earth studies have never been so important. But in a crowded field of concerns, how can researchers prioritise the most ...