Charles Friedel was a French chemist and mineralogist. He studied under famed chemist and microbiologist Louis Pasteur at the Sorbonne. He later obtained the post of professor of chemistry and mineralogy at the Sorbonne. He collaborated with James Crafts to develop the Friedel-Crafts alkylation and acylation reactions. His son Georges also became a renowned mineralogist.
Best known for exploring the geology of the Tertiary Period, Alexandre Brongniart initially taught natural history and then became a professor of mineralogy. He also worked for the development of porcelain enameling in France. His other works include a classification of reptiles and the introduction of geologic dating.
After studying engineering and mineralogy, Quintino Sella taught math and mineralogy for a while before stepping into politics. He later served as the minister of finance of a newly unified Italy. Sella also convinced King Victor Emmanuel II to make Rome the capital after the French withdrew from the city.