This French work explores the concept of Chrysopée, the legendary process of transmuting base metals into gold in alchemical tradition. The book combines theoretical reflections on alchemical symbolism with a manuscript attributed to Pierre Dujols-Fulcanelli, providing practical insights into historical alchemical methods. Written by Jean-François Gibert, it serves as both an examination of alchemical philosophy and a presentation of historical alchemical texts. The work appeals to readers interested in the history of science, esoteric traditions, and medieval philosophical practices.