Detailed material characterizations highlight the elemental chemical composition and purity of the alloys used by the jewellers in both regions and over time. The comparisons of the size, the total number of components, the estimated manufacturing time, and the weight of precious metal needed to produce each type of jewel shed light on the level of complexity involved in their manufacture and highlight the exceptional pieces. The observations and comparisons of tool marks, defects, and quality of realization evidence the presence of very fine pieces manufactured by highly skilled goldsmiths using sophisticated tools alongside coarse productions manufactured by unexperienced craftsmen with low skill and more rudimentary tools. In addition, they allow us to identify pieces likely produced in the same workshop and probable imports.