Vein crystallization

Vein crystallization occurs when mineral-rich liquids flow through cracks or fissures in rocks and leave behind solid mineral deposits as they cool or evaporate. Over time, these depositing minerals form visible veins of crystal-lined mineral material within the host rock. This process depends on factors like mineral composition, temperature, pressure, and flow rate of the fluid. The resulting veins often contain well-formed crystals and can reveal important information about the geological history and conditions beneath the Earth's surface.