Fig. 5From: Unravelling the construction of silver filigree spheres from a seventeenth century shipwreck using non-invasive imagingClose-ups of the surface of the spheres. a Concretions protruding from in between the filigree decoration on sphere 5372-013; b golden sheen visible beneath the corrosion on 5372-013 (an illustrative movie can be found in Additional file 1). Optical micrographsBack to article page