On technology and production techniques of early medieval glass rings from Silesia: Early medieval glass rings from Silesia

Glass rings used to be one of the most common jewellery types in the 10th-13th centuries in Central Europe, especially Silesia. The popularity of this type of decoration in this area could indicate its local origin. The chemical composition of the glass seems to confirm this theory. The Silesian glass rings analysed in this paper were made of high-lead alkaline and non-alkaline glass or of lead-ash glass. There was also a close relationship between the colour of the finished products and the chemical composition of the glass. This provides new data for the study of the problem of production and distribution of glass jewellery in Central Europe.