The Eisco Phyllite rock specimen is a 3-inch hand sample representing a classic example of low-grade metamorphic transformation. Derived from shale or slate, phyllite retains the fissile structure of slate but exhibits a distinctive sheen and fine foliation, resulting from the alignment of platy minerals during metamorphism.
Its soapy texture and slight sheen make phyllite easily distinguishable from its parent rock, offering students a clear visual and tactile comparison in metamorphic studies. Each sample is individually labeled and barcoded, and comes packaged in a clear storage bag. Ideal for NGSS-aligned geology lessons focusing on rock transformation, structure, and classification.