In the current article we present the summarized results of the recent interdisciplinary research, which was focused on the production provenance of the glass artefacts from the 9th century AC. The artefacts were found in 1960 during a previous archaeological excavation of four ovens in Nitra town. They were published many times as a proof of the existence of a glass production. Multiphase interdisciplinary analyses of glassy artefacts were subsequently published in the different editions. Here we present the results in resume and rise a discussion about the importance of these findings for the research of the historical glass and for the knowledge of the details connected with the technology of metallurgy of iron. We use a working term „glass-none glass” for the type of glass made during the iron production. This term should be understood as a contribution to the discussion on the necessity to distinguish through the verbal terms atypical to the glass production chemical compositions. These compositions have been evident for a long time among the results of the analysis of the glass beads mainly and of the other small items.
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