Granite Rock Specimen - Natural Igneous Mineral Sample for Geology & Education #3576100 (License: Personal Use)

The specimen displays a typical medium- to coarse-grained igneous texture, with prominent pink orthoclase feldspar crystals (microcline/perthite), translucent to white quartz grains, and scattered black biotite or hornblende. Its irregular surface and lack of polishing suggest it was collected in the field rather than prepared for display. The mineral assemblage indicates slow cooling deep within the Earth’s crust.

Used in educational settings (e.g., geology classrooms, museum exhibits, online mineral databases) to illustrate intrusive igneous rock formation, mineral identification, and petrographic analysis. Matches user intent for learning about rock types, field sampling, or sourcing geological specimens.