Fig. 2

Raman spectra collected from shard #1 from the Santa Maria Madre de Deus (A) feldspar, β-wollastonite; (B) feldspar, β-wollastonite; (C) feldspar, β-wollastonite; (D) feldspar, β-wollastonite (shard back); (E) anatase (shard edge); (F) ilmenite or ilmenite hematite solid solution (Ilm-Hem_ss)—spectrum collected from a dark particle in blue area. Spectra are to scale and have been baseline corrected and offset for clarity