Minerals from the Jacques Geffroy collection (1918-1993), geological engineer, mineralogist and metallogenist. He worked at CEA Saclay (Essone), the French Atomic Energy Commission, and CIPRA – Centre International d’Enseignement en Prospection et Valorisation des Oreaux Radioactifs Industriels, in Razès (Haute-Vienne). Author of numerous publications for mineral collectors.