The Sorbonne University mineral collection now accounts for about 16,500 minerals divided between a permanent exhibition and a collection reserved for research and teaching purposes. The permanent exposition brings together approximately 1,500 specimens, which is open to the public. There are 5,659 mineral species known to date and the collection comprises of more than 1,700 species. Created in 1823 by François Sulpice Beudan, successor to Abbé René-Just Haüy as chair of mineralogy at the Sorbonne, it is one of the oldest mineral collections in France. It welcomes several thousand people per year, including a large proportion of students, teachers and researchers who visit in the frame of educational and scientific programs. As a university collection, its primary objectives are research and teaching, to which scientific mediation is naturally added thanks to the presence of a gallery, logistical and legislative frameworks allowing the reception for the general public. The collection also relies on the “association des amis de la collection de minéraux de la Sorbonne” (A.Mi.S), an association that aims to preserve, develop and promote the collection. We present here the main actions carried out by the collection over the last three years in terms of i) scientific mediation: through temporary thematic exhibitions, ii) research: through the enrichment of the sample catalogue available to research studies in the physicochemical properties of minerals and iii) teaching: through training initiatives for primary and secondary school teachers.