Natural Rock Specimen with Mineral Veins - Geology Sample Image #89986 (License: Personal Use)

This image displays a hand-sized, irregularly shaped rock with a predominantly light gray matrix and scattered dark, elongated mineral inclusions-likely amphibole or biotite. The surface exhibits fine grain texture and subtle striations, suggesting metamorphic or igneous origin. Lighting emphasizes topography and composition, making it suitable for mineral identification or earth science illustration.

Used in geology education, museum digital collections, or online mineral databases; serves users seeking visual reference for rock identification, academic study, or curriculum materials.