Miners discover a one-of-a-kind amethyst crystal inside a large basalt geode in the Santa Rosa mine in Uruguay’s Artigas ...

Deep within a remote private mine, a remarkable discovery recently captured the attention of all who encountered it. Miners, ...

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 ...

Geodes, for instance, are created when mineral-rich water seeps into hollow spaces within rock formations and slowly evaporates, leaving behind dazzling crystals like quartz and amethyst.

opal and quartz crystals, according to the United States Department of Agriculture. Thundereggs aren't technically rocks, but geodes. Geodes typically have a hollow or semi-hollow interior filled ...