Banded Gneiss Rock Specimen - Natural Geological Formation #226982 (License: Personal Use)

The image displays a well-preserved gneiss sample with alternating bands of light-colored feldspar/quartz and dark biotite/hornblende minerals, indicating strong directional pressure during formation. Its rough, irregular edges suggest it was hand-collected and minimally processed to retain natural texture. The visible foliation highlights the rock’s origin in deep crustal environments over millions of years.

Used on educational geology websites, museum digital collections, or rock identification guides; serves users seeking visual references for metamorphic rocks, academic study, or hobbyist mineral collecting.