ICM Fe abundance as a function of stellar over baryon fraction. The red shaded region show f_⋆/f_b values for massive systems as reported in Coupon et al. (2015). The gray shaded region represents the Fe abundance measurements for massive clusters (Ghizzardi et al. 2021a). The dashed lines trace the minimum and maximum values of $r_o{\mathcal{Y}}_{\mathrm{Fe},\odot }-Z_{\mathrm{Fe},\odot }^{\star }$ for which the ICM abundance, predicted from f_⋆/f_b, through Eq. (4), agree with the measured one. A deeper red is adopted to highlight the concordance region between predicted and measured quantities.