| At the Redskin mine, molybdenite is found in small cylindrical greisen pipes in the Redskin Granite. |
| At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet. |
| Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations. |
| Molybdenum never occurs as the free element in nature, but is most commonly found in the minerals molybdenite and wulfenite. |
| The central potassic core normally contains low-grade mineralization consisting of minor chalcopyrite, molybdenite, and pyrite. |
| Pyrite, garnets, talc, magnetite, molybdenite, and chloritoid also commonly occur. |
