“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 ...

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

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 ...

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 ...

Large crystals found in geodes and other rocks are relatively ... and emeralds continue to qualify as "precious." (At one time, amethyst was also considered a precious gem, but large reserves ...

Full-size large SUVs can seat up to eight people, with the third row often providing comparable space to the middle row. They’re also generally best for towing. It measures over five metres long, tips ...

A major fire has engulfed the medieval cathedral of Notre-Dame in Paris, one of France's most famous landmarks. The 850-year-old Gothic building's spire and roof have collapsed but the main ...

Having a big, but still pocketable, smartphone gives me lots of screen space to enjoy video or games on, and a large battery to keep enjoying them on while I'm out away from a charger. And if you ...

A full-size SUV is a large sport utility vehicle with three rows of seating, plenty of cargo space, and the ability to tow large items. What is the most reliable large SUV? The most reliable large ...

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 ...