Banded Metamorphic Rock Specimen - Gneiss or Migmatite Sample #3583250 (License: Personal Use)

The rock displays distinct foliation with alternating light-colored (quartz/feldspar-rich) and dark (biotite/hornblende-rich) bands, characteristic of high-grade metamorphism. Subtle reddish veining suggests later hydrothermal alteration or iron oxide infiltration. Its irregular surface and partial polish highlight both natural fracture patterns and preparation for study or display.

Used in educational geology resources, museum exhibits, or mineralogy websites to illustrate metamorphic textures and rock classification; matches user intent for identifying rock types, learning about foliation, or sourcing specimens for teaching.