Metallicity of stars in both the Pristine-Gaia synthetic and Pristine DR1 catalogues around four globular clusters that span a wide metallicity range. From top to bottom, 47 Tuc, M 5, M 15, and M 92. The two left-most columns show the distribution of metallicities of stars in both catalogues as a function of right ascension. They are in good agreement with the known metallicity of the clusters, indicated by the red dot-dashed lines (Carretta et al. 2009). The two right-most columns of panels show the distribution of stars around the clusters, color-coded by metallicity. With the metallicity information, likely members of the clusters are very easy to pick out among the field contamination.