| The hematite and the clays appear intergrown, suggesting that they co-precipitated. |
| Sandstones with this component contain authigenic hematite intergrown with kaolinite and illite and replacing muscovite. |
| At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet. |
| The fluids that precipitated the veins were a likely source for some of the iron that formed the hematite. |
| Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals. |
| A spectrometer on MGS revealed a large deposit of hematite in the heavily cratered highlands. |
