Types of Rocks Illustrated: Sandstone, Obsidian, Coal, and Pumice #131479 (License: Personal Use)

This educational graphic presents four distinct rock types in a vibrant 2x2 layout: a textured orange-brown sandstone representing sedimentary rocks; a glossy black obsidian with concentric swirls indicating volcanic glass; a jagged black coal illustrating metamorphic or organic-rich deposits; and a light gray, vesicular pumice showcasing highly aerated volcanic rock. Each specimen is stylized for clarity against contrasting backgrounds to emphasize texture and form.

Used in geology education websites, K-12 science curricula, museum exhibits, or interactive learning apps to help users visually differentiate rock classifications by origin and appearance. Matches user intent for quick reference, study aids, or introductory earth science content.