Fig. 4From: Porcelain shards from Portuguese wrecks: Raman spectroscopic analysis of marine archaeological ceramicsRaman spectra collected from shard #2 from the Santa Maria Madre de Deus. A α-Quartz (shard back), (B) ilmenite or ilmenite hematite solid solution (Ilm-Hemss)—dark particle in white area on topside of sample, (C) hematite—dark particle in white area, (D) luminescence from REE— light blue area, (E) carbon, α-Quartz, anatase—(shard edge)Back to article page