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 ...

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ...

Geodes are hollow rock formations often with quartz crystals, such as amethyst ... as well as magnificent giant geodes sometimes over 5 m high. The deposits here have been recognized as one ...

Gazelle Elegante The stock at this small Etsy boutique runs the gamut from meteorites to geodes to stunning specimens that come in gifting-ready display boxes. The seller has been in the crystal ...

Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and ...