Researchers from the University of Göttingen have investigated an intriguing geological phenomenon in Uruguay. These scientists are trying to uncover the mysteries behind the formation of amethyst ...

Calcite is a block that has been in Minecraft since the 1.17 Caves & Cliffs update. During this time, it has found its special place within the infinite world. Primarily used as a decorative block, ...

Amethyst geodes are one of Minecraft's newest additions, thanks to the 1.17 Caves & Cliffs update. They are natural underground structures that provide materials such as amethyst, smooth basalt, and ...

Amethyst geodes—some stretching 5 m long—dot the ancient lava flows of Uruguay’s Los Catalanes mining area. The geodes contain calcite, colorless quartz, and agate, another quartz mineral. Large ...

A grapefruit-sized dinosaur egg from a fossil bed in China gave paleontologists a huge surprise. Rather than a dinosaur embryo or sediment, it was filled with sparkling crystals of calcite lining the ...

From the spiky teeth of a geode containing barite and dogtooth calcite crystals, the rich browns and golds of smoky quartz and goethite needles on calcite, and the coral-like branches of plumose ...