Epidote

This specimen is epidote, a common but scientifically important silicate mineral, displayed here as a massive to fine-grained aggregate within its host rock. It shows the characteristic olive-green to yellow-green coloration typical of epidote, caused by iron within its crystal structure. The surface appears granular and dense rather than forming large, well-defined crystals, which is typical for epidote formed during regional or hydrothermal metamorphism. Epidote commonly forms when calcium-rich rocks are altered by heat, pressure, and chemically active fluids, making it a key indicator mineral for metamorphic and hydrothermal geological environments.