Cobalt glass beads ("melon beads") from the 1st century AD, found in Heerlen, the Netherlands, and in Aachen and Jülich, Germany. The objects were photographed as part of a traveling exhibition about early Roman Maastricht, Heerlen, Aachen and Jülich, "Augustus op het spoor", in December 2015 in Centre Céramique, Maastricht, the Netherlands.