Before revision: Other crystalline minerals were also used, the more common ones were iron pyrite (iron sulfide, FeS2, "fool's gold", also sold under the trade names "Pyron" and "Ferron"), molybdenite (molybdenum disulfide, MoS2), and cerussite (lead carbonate, PbCO3) Not all specimens of a crystal would function in a detector , often .
After revision: Other crystalline minerals being also used, the more common ones were iron pyrite (iron sulfide, FeS2, "fool's gold", also sold under the trade names "Pyron" and "Ferron"), molybdenite (molybdenum disulfide, MoS2), and cerussite (lead carbonate, PbCO3) Not all specimens of a crystal would function in a detector .