This work reports the results of the archaeometrical investigation performed on twenty glass tesserae collected in 2018, during the restoration of the Four Seasons mosaic, which dates between the second and the third century AD, in the archaeological area of the S. Aloe quarter in Vibo Valentia (Calabria, Italy). The coloured glass tesserae were analysed through a micro-analytical approach using an Electron Probe Micro Analyser with Wavelength-Dispersive Spectroscopy (EPMA-WDS) and Laser Ablation with Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). The aims of the study were (1) the determination of the chemical composition and the technology of glass mosaic tesserae production; (2) the individuation of colouring and opacifying agents used for the production of the glass tesserae. The glasses show the typical soda–lime–silica composition. EPMA-WDS results prove the use of Sn–Pb antimonates to create yellow glass, and of cuprite to obtain the red colour. Copper and cobalt were employed in both green and blue glasses to produce different shades of colour (grey, tints of green, dark and light blue).

中文翻译：

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意大利维博瓦伦西亚–卡拉布里亚S.芦荟季的四个季节马赛克的玻璃状Tesserae：化学表征

这项工作报告了在维博S.Aloe街区考古区的四个季节镶嵌物的修复过程中对2018年收集的二十个玻璃镶嵌进行的考古学调查的结果，该镶嵌物可追溯到公元二世纪和三世纪之间。瓦伦西亚（意大利卡拉布里亚）。使用带有波长色散光谱的电子探针显微分析仪（EPMA-WDS）和带有电感耦合等离子体质谱的激光烧蚀（LA-ICP-MS），通过微分析方法对有色玻璃镶嵌进行了分析。研究的目的是：（1）确定玻璃马赛克镶嵌的化学成分和生产工艺；（2）用于生产玻璃镶嵌的着色剂和遮光剂的个体化。眼镜显示出典型的苏打，石灰，二氧化硅成分。EPMA-WDS结果证明，使用Sn-Pb锑酸盐可产生黄色玻璃，而使用铜盐则可获得红色。在绿色和蓝色玻璃中都使用了铜和钴，以产生不同的颜色阴影（灰色，绿色，深浅蓝色）。