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Almira Kevilj-Olovčić

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During archaeological campaigns in 2010, 2012 and 2015 at the Medieval necropolis Crkvina, in central Bosnia, beside skeletal remains, pieces of jewelry, ceramic, construction material, fabric and small artefacts from different periods were also found. The most important finding was a signet ring, with the lily motif, believing to belong to Bosnian king or some high class nobility from Medieval period. Beside the ring, other richly decorated silver and gold jewelry was also found. The goal of this study was, for the first time, to provide information about composition of the most interesting artefacts and also to enhance knowledge about Medieval jewelry industry in Bosnian Kingdom. Results showed that the majority of jewelry was made from silver, of highest quality, with gold being used for surface gilding. Higher than usual copper content in some of the rings (more than 3% in weight percentage) was possibly added intentionally, to enhance properties of the silver. One of the rings, without any decorations was proved to be brass made, with zinc content as high as almost 20%. Results of this study contribute to the better understanding of the otherwise previously scarce knowledge of jewelry tradition in Medieval Bosnian Kingdom.

In this paper, chemical analysis of slag from abandoned medieval mine in Gornji Potočari, Srebrenica municipality was described. Total of 10 metals were analyzed: chromium, copper, cadmium, nickel, cobalt, zinc, silver, manganese, iron and lead. Traces of chromium, nickel, cobalt, copper, manganese and cadmium in the samples point to the fact that the starting ore also contained these elements. Results showed high content of iron (25.11–33.12%), lead (5.90–10.77%) and zinc (1.16–6.79%). The content of silver had a positive correlation with the content of lead, which is in favor of the initial hypothesis that the starting ore was galena (PbS). High zinc content indicates that the sphalerite (Zn,Fe)S was also used in the process, whereas iron most likely emanates from pyrite (FeS2). Galena and sphalerite can be found in Srebrenica area in large quantities. The results of the analysis show that the site was used for the production of lead and silver (from primary ores), intensive mining activity during the Middle Ages, and the latest date that we can account for slag origin is the end of the 16th century.

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