Claude François Geoffroy (1729–1753) was a French chemist. He discovered the chemical element bismuth in 1753. Before this time, bismuth-containing minerals were frequently misidentified as either lead or tin ores.

He is known as Claude Geoffroy the Younger to distinguish him from his contemporary Claude Joseph Geoffroy (1685–1752), also a French chemist.

French chemists | 1729 births | 1753 deaths | Discoverers of chemical elements

クロード・F・ジョフロア