Coloured glass, produced in the late 19th and early 20th century and pigmented by addition of heavy metals, such as uranium, was studied. The glass objects (vessels, vases and goblets) held by the National Museum of Slovenia were analysed by proton induced x-ray emission (PIXE), proton induced gamma-ray emission (PIGE) and in some cases by Rutherford backscattering spectrometry (RBS). The aim was to classify the glass objects according to their composition and to explain specific production details of this type of glass. According to the results obtained, the authenticity of several objects of doubtful provenance was checked. The red glasses were pigmented by copper; contrary to expectations, rare Egermann examples pigmented by gold were not found.
