Among the glass finds of the Pompeii excavations, numerous objects of opaque and transparent glassy material of different colours were recovered and classified as game counters. The main aims of this work were to characterize these samples so as to identify the materials used as colorants and opacifying agents, and subsequently to deduce the technology used for their production. The results of the chemical and mineralogical analysesobtained for game counters were also compared with those obtained for transparent and opaque glass artefacts. The chemical analyses were carried out, using only 300 mg ofsample, by both wavelength-dispersive electron microprobe and X-ray fluorescence analysis. The crystalline phases present in the opaque glass were identified using both an automatic X-ray powder diffractometer and a Gandolfi camera. Secondary and backscattered electron images were obtained to study the distribution and morphology of the opacifier particles, and qualitative chemical analyses were obtained with an energy-dispersive system. All the game counters analysed can be classified as silica–soda–lime glass. Two calcium antimonates (CaSb2O6 and Ca2Sb2O7) were identified in the opaque white, green and blue glass, and Pb2Sb2O7 particles were detected in the opaque yellow glass. Particles of metallic copper were detected by both energy-dispersive system and X-ray powder diffraction. These results support the hypothesis that transparent game counters were obtained by remelting of fragments of common transparent artefacts. In contrast, opaque finds wereprobably produced using the glassy paste employed in the production of mosaic tesserae.
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|Data di pubblicazione:||2006|
|Titolo:||Archaeometrical Analyses of Game counters from Pompeii.|
|Autori:||ARLETTI R.; CIARALLO A.; QUARTIERI S.; SABATINO G.; VEZZALINI G.|
|Titolo del libro:||Geomaterials in Cultural Heritages|
|Collana:||geological Society Special Publication|
|Nome editore:||The Geological Society|
|Appare nelle tipologie:||Capitolo/Saggio|
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