A petrologist is a scientist who studies rocks and the processes that form them. They analyze the mineral composition, texture, and structure of rocks to understand their origins and evolution. Petrologists often work in laboratories, using tools like microscopes and chemical analysis equipment to examine rock samples. In addition to studying igneous, sedimentary, and metamorphic rocks, petrologists may also explore how geological events, such as volcanic eruptions or tectonic movements, affect rock formation. Their research contributes to fields like geology, mineralogy, and environmental science, helping us understand Earth's history and resources.