Common Minerals and Rocks

"Common Minerals and Rocks" by William O. (William Otis) Crosby is a late 19th-century educational work that explores the core principles of geology by categorizing common minerals and rocks to help readers understand the geological forces that molded Earth's crust, emphasizing the importance of understanding dynamic forces, like the impact of air and water, on Earth's surface and hinting at a classification system for geological sciences, setting the stage for a practical study of Earth's composition and processes.