Fig. 6From: Porcelain shards from Portuguese wrecks: Raman spectroscopic analysis of marine archaeological ceramicsRaman spectra collected from shard #4 from the Santa Maria Madre de Deus. (A) Carbon, quartz (B) to (D) luminescence from REE, (E) luminescence from REE (shard edge). Spectra are to scale and have been offset for clarityBack to article page