Fig. 9: Elemental distributions in the Blue Room samples. | npj Heritage Science

Fig. 9: Elemental distributions in the Blue Room samples.

From: The Pompeiian ‘Blue Room’: in situ detection and economic estimation of Egyptian blue pigment in an ancient domestic sacrarium

Fig. 9: Elemental distributions in the Blue Room samples.

Three rows (top to bottom) show an unembedded cornice sample, an unembedded wall fragment, and an embedded wall fragment from the Blue Room. Column a displays brightfield optical micrographs with their corresponding elemental maps in column b. Column c shows a higher magnification optical micrograph of each sample, with their corresponding elemental maps in column d. The rightmost region of the figure, column e, shows ternary diagrams of the two unembedded samples, mapping their relative concentration of Ca, Si, and Cu.

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