French mineralogist (1796-1878).
Gabriel Delafosse (16 April 1796 – 13 October 1878) was a French mineralogist who worked at the Natural History Museum in Paris and for sometime at the University of Paris. He contributed to development of the idea of unit cells in crystallography. The mineral Delafossite is named after him. He was one of the founding members of the Société Geologique de France.