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This paper discusses some preliminary results regarding raw materials used in ancient glass mosaic tesserae. The studied glass tesserae were recovered during the archeological excavation of the mosaics at the Christian basilicas in Byllis, Lin and Elbasan, which according to the archeologists were built between the end of V th and beginning of VI th century AD. In the recent years, several studies are performed on opaque coloured glass but in Albania only few studies are performed in this field. These samples are analyzed using optical microscopy and micro X-ray fluorescence. Optical microscopy is used to analyse the microstructure of the glass tesserae. The main elements and trace elements are determined qualitatively from measurements performed with micro X-ray fluorescence. The glass matrix resulted to be very heterogeneous with too many inclusions dispersed on it. Several elements which are responsible for the color and opacity of glass tesserae are determined. Comparisons are made between the same colors of glass tesserae from different archaeological sites.

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Nondestructive Testing (NDT) is a non-invasive method based on physical principles used to evaluate the integrity and characteristics of materials. Its measurement methodology covers a wide range of applications of materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Radiography is one of the most important and widely used NDT methods for volumetric examination. In general, Radiography Testing (RT) is a method of inspecting materials for hidden flaws by using the ability of short wavelength electromagnetic radiation (high energy photons) to penetrate various materials. The intensity of radiation that penetrates and passes through the material is captured by a radiation sensitive film. This study presents the evaluation of the dose rate field in and around the radiation beam for MHF 200D X-ray tube model, using a large interval of voltage (20 to 200 kV) and current (0.5 to 8 mA). We controlled the variables that represent the essential characteristics of beam radiation quality, such as voltage (kV), and determined the Half-Value Layer (HVL) for different values of voltage and current.

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