False-color backscattered electron images of the run product at 1 GPa and 1823 K. Panel a: cross-section of the whole capsule is shown. The reaction zone lies between the silicon carbide layer and the silicate-rich layer representing a carbon-enriched rocky exoplanet. Panel b: the reactants (SiC and FeO from silicate melt) and the products (quartz, graphite, and Fe–Si alloy) are clearly visible. Panel c: one of the Fe–C blebs has a Fe–S rim, surrounded by orthopyroxene crystals and silicate melt. Panel d: at the bottom of the capsule, olivine crystals are present instead of orthopyroxene.