Abstract: Th- and Zr-bearing perovskite and Zr-rich Ti garnet are described from the Polino calcite carbonatite, Italy. The garnets contain 6.05–7.50 wt.% ZrO₂ in cores and up to 15.80 wt.% in rims. Silicon is low in these garnets and substantial Al and Fe³⁺ has been assigned to the tetrahedral sites. A strong correlation of Si with Zr from published data suggests the possibility that some Zr may also be tetrahedrally coordinated. However, the chemistry alone does not constrain the site distribution of Fe, Ti, Zr and Mg unambiguously. The perovskites are very unusual in containing 2.81–3.27 wt.% ZrO₂ and 1.48–1.71 wt.% ThO₂. For comparison, new analyses are presented of the zirconium garnet kimzeyite and coexisting perovskite from the type locality at Magnet Cove.