👉 Atom veins are small, branching channels within a rock or mineral that contain highly concentrated concentrations of one or more elements. These veins form when mineral-rich fluids move through fractures and pores in the surrounding rock and deposit the minerals as they cool or react with water. The veins can be found in a variety of geological settings, including metamorphic rocks, igneous intrusions, and sedimentary deposits. They are important sources of valuable minerals such as gold, copper, and silver.