A study of the composition and microstructure of silver hoards from Tel Beth-Shean, Tel Dor, and Tel Miqne, Israel

摘要

The chemical composition and microstructure of objects excavated in three hoards from the end of the Late Bronze and Iron Age sites in Israel were studied using energy-dispersive x-ray fluorescence analysis and optical metallography. The objects are industrial in origin (scrap or jewelry pieces) and include differently shaped ingots, mainly so-called hacksilber, in various sizes. The primary composition is Ag with typically several percent of Cu and Au and less than 1 % of Pb. The concentrations of these metals in each hoard differ significantly. The microstructure of the hacksilber ingots shows a typical dendritic as-cast structure and a surface cold work deformation, probably caused by chiseling the ingot piece off a larger cast bar. Relatively high concentrations of Au, as in the above samples, were observed previously in Egyptian ancient silver which differs from the ancient Greek silver that contains a significantly lower Au content.