Several sulfide, tectosilicate, and cyanide minerals exhibit photosynthesis red edge-like reflectance features that could be mistaken for surface biosignatures on exoplanets.
Lazurite and especially sodalite can effectively mimic the VRE/PRE in simulated telescope data (Figure 3)
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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.