Many artifacts found in the places where ancient communities lived in Jurjan indicate the antiquity of life in this region. Much evidence of Jurjan's importance in historical periods, including the Achaemenid, Sassanid, and Seleucid periods, can be found in inscriptions from that period. During the Seljuk period, Jurjan was the cradle of science, literature, art, and industry in northern Iran, and was one of the country's important centers for glassmaking, pottery, and metalworking, and the use of glazes on pottery. The use of black patterns and turquoise glazes is abundant in pottery objects excavated in Jurjan. In this study, three samples of pottery with this type of glaze in the Jurjan region were examined in terms of technology, and the manufacturing method and materials used in them were studied. In this regard, the glazes were identified using digital microscopy, polarizing optical microscopy, scanning electron microscopy, and X-ray diffraction analysis. According to microscopic images of the cross-sections of the samples, the glazing method is underglaze and three layers are visible to create the glaze. First, a milky layer called engobe is created on the surface of the pottery, then black patterns are applied on it, and finally a layer of transparent turquoise glaze covers the entire surface.
