The todorokite has been altered near the surface and along faults or fissures to pyrolusite, and perhaps to manganite.
en.wikipedia.org Commonly associated minerals are pyrolusite, cryptomelane, manganite, psilomelane, quartz, feldspar and calcite.
en.wikipedia.org Pyrolusite occurs associated with manganite, hollandite, hausmannite, braunite, chalcophanite, goethite and hematite under oxidizing conditions in hydrothermal deposits.
en.wikipedia.org The other two new minerals are robertsite and janggunite, while the eight previously known cave minerals include calcite, gypsum, apatite, variscite, strengite, manganite, rodocrosite and pirolusite.
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