Several sulfide, tectosilicate, and cyanide minerals exhibit photosynthesis red edge-like reflectance features that could be mistaken for surface biosignatures on exoplanets.
Sulfide minerals were excluded because their “edges” are outside of the 685–715 nm window (as shown by Figure 1)
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Mineral False Positives in the Search for Exoplanet Surface Biosignatures
Several sulfide, tectosilicate, and cyanide minerals exhibit photosynthesis red edge-like reflectance features that could be mistaken for surface biosignatures on exoplanets.