LECTURE 1 MINERALOGY AND CRYSTALLOGRAPHY
2022-2-7 · pyrolusite) that were used in cave paintings and the diverse hard or tough minerals and rocks (e.g., jade, flint, and obsidian) that were shaped into tools and weapons. In Kenya, such prehistoric tools dating 500,000 years have been located at an archaeological site within the Rift valley, at Olorgesaille, in Narok district. In addition, mining ...