GCE predictions for the abundance ratios of refractory elements. The GCE tracks are labeled according to the choice of core-collapse supernova (CCSN) yield sets: either M. Limongi & A. Chieffi (2018; LC18) or K. Nomoto et al. (2013; N13), and upper (h), lower (l), and fiducial ( ⊙ ) calibration for [Fe/H] in the solar neighborhood at the time of the birth of the Sun. The M dwarf (large orange circles) and FGK data (small gray circles) are the same as in Figure 1.