Eric Walker added Pyrite - Wikipedia to Pyrite

Eric Walker added Research Brief: ‘Fool’s gold’ may be valuable after all | University of Minnesota Twin Cities to Magnetism and Pyrite

Eric Walker added Pyrite to Iron sulfide, and added Iron sulfide to Sulfur, Minerals and gems and Iron

Eric Walker added Pyrite - Wikipedia and Research Brief: ‘Fool’s gold’ may be valuable after all | University of Minnesota Twin Cities to Pyrite, and added Pyrite to Iron sulfide