This paper presents the results of archaeometric research on the white and red materials used to decorate some ceramic vessels belonging to the Boian culture, the Vidra and Spanţov phases from the 5th millennium BC, discovered at Hârşova-Tell, on the right bank of the Danube, Romania. Digital microscopy, wavelength-dispersive X-ray fluorescence spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy were used to identify the morphology, the crystalline phases, chemical formula, and percentage content of each crystalline phase in the white decoration materials and what type of pigment was used to prepare the red paint. The results obtained reveal that the white decorating material in the pottery is mostly made of calcite. It was added after the pottery was fired. Sometimes, powders from burnt bones were also used. The red pigment is hematite. The work contributes to the completion of a puzzle related to the artistic vision of the members of the Boian communities in decorating ceramics with culture-specific motifs, preserving the pattern, and adapting to the local natural resources.

The paper presents a qualitative and quantitative structural analysis of some pottery fragments belonging to the Boian culture, discovered in the archaeological site of Galatui - Movila Berzei, in a dwelling - sanctuary. Six representative pottery fragments were used. To visualize some microscopic details of the surfaces of these pottery fragments, digital optical microscopy was used. Also, for the quantitative and qualitative analysis of the crystalline structure of the powder samples taken from the surfaces, X-ray diffraction (XRD) was used. The obtained results show that the ceramic mass has a high content of quartz, accompanied by various oxide compounds from the clay used, low in calcium but rich in iron. The analyzed pottery fragments present different decorative patterns, from parallel and broken lines, to checkerboard-type patterns that denote a special leaning towards aesthetics of the communities from Galatui - Movila Berzei.

The paper presents a structural analysis of two pottery fragments belonging to the Hamangia phase III Ceamurlia culture, discovered in a settlement with several living levels on the northern shore of Lake Techirghiol, at the Minerva – Paloda Hill. From two ceramic fragments, fired in a reducing atmosphere, samples were taken to perform X-ray diffraction (XRD) and wavelength‐dispersive X-ray fluorescence spectra (WDXRF) analyzes to determine the crystalline structure and composition of the ceramic materials. Digital optical microscopy was used to observe the details of the fracture surfaces of these ceramic fragments. This work contributes to the knowledge of the techniques and materials used by the Hamangia civilization in the manufacture of ceramic vessels.