| The most common secondary uranium mineral at the mine, it is typically associated with sooty black organic material and may pseudomorph it. |
| It is sometimes found as a pseudomorph of sérandite crystals usually coated by a very fine dark green powdery chlorite-group mineral. |
| It is a pseudomorph after iolite, and consists mainly of hydrous aluminium silicate. |
| Berthierine, a member of the kaolinite-serpentine group, is found as pseudomorphs at MSH. It is a pseudomorph after a mineral with a layered structure, possibly some mineral of the mica group. |
| Pseudomorph, mineral formed by chemical or structural change of another substance, though retaining its original external shape. |
| In the formation of a pseudomorph by substitution, the original substance has been gradually removed and simultaneously replaced by another. |
