Illustration of a Natural Rock Formation - Geology & Earth Science Resource #3787611 (License: Personal Use)

This grayscale illustration shows an irregularly shaped rock with pronounced dark striations suggesting mineral veins or weathering patterns. The outline is rough and organic, mimicking real-world erosion, while the flat shading emphasizes form over realism. It serves as a clear, simplified visual aid for geological concepts.

Used in educational websites, science textbooks, museum exhibits, or geology blogs to represent generic rock specimens when photographic realism isn’t required. Matches user intent for learning basic rock identification or illustrating geological processes.