“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 ... Most geodes are small as they form inside gas bubbles in lava rocks. Only in rare cases is lava so rich in gases that very large voids form or larger ...

University of Göttingen researchers uncovered that Uruguay’s amethyst geodes formed from low-temperature groundwater fluids, proposing a groundbreaking formation model. New research from the ...

The best 85-inch TVs aren’t just big, they offer an immersive home theater experience and are packed with some of the most high-end TV tech. However, you’ll need plenty of space and a serious ...

Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

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 ...

The cross-shaped pendant features large amethyst stones, framed by 5.2-carat diamonds. It was first bought by businessman Naim Attallah in the 1980s who, as a result of his friendship with Diana ...