Colourless glass from the Palatine and Esquiline hills in Rome (Italy). New data on antimony- and manganese-decoloured glass in the Roman period

Late Antique Glass Vessels and Production Indicators from the Town of Herdonia (Foggia, Italy): New Data on Cao‐Rich/Weak HIMT Glass

“…A partial overlap can be found with the LAC‐Mn group (Gliozzo et al ), although small differences can be found in terms of the SiO 2, Na 2 O and CaO contents. Some items may fit either the CaO‐rich HIMT or the LAC‐Mn groups, and this is not surprising given that a quarter of the CaO‐rich HIMT samples are colourless.…”

“…This group includes naturally coloured glass, dated between the first and the fourth centuries ad , compositionally similar to the HIMT glass and, for this reason, associated with a North African area of origin (Gliozzo et al ). The Roman naturally coloured blue–green and yellow glass group 2 is defined by four glass collections investigated by Mirti et al () and Silvestri (), and includes materials dated between the first and the fourth centuries ad , compositionally similar to Levantine glass and, for this reason, associated with the Syrian–Palestinian area of origin. The RC‐Sb and LAC‐Sb glass groups, recently proposed in Gliozzo et al (), which include more than 450 Roman and Late Antique colourless samples, dated between the first century bc and the seventh century ad . All samples are compositionally characterized by MnO contents below 0.2 wt%, Sb contents above 500 ppm and a REE pattern (when available) closely resembling that of Levantine glass.…”

“…The Roman naturally coloured blue-green and yellow glass group 2 is defined by four glass collections investigated by Mirti et al (1993) and Silvestri (2008), and includes materials dated between the first and the fourth centuries AD, compositionally similar to Levantine glass and, for this reason, associated with the Syrian-Palestinian area of origin. • The RC-Sb and LAC-Sb glass groups, recently proposed in Gliozzo et al (2015a), which include more than 450 Roman and Late Antique colourless samples, dated between the first century BC and the seventh century AD.…”

“…Weak HIMT group is defined in Rosenow and Rehren (2014), while the HIMT 2 group is reported by Foster and Jackson (2009). Preliminary values for the RC/LAC-Sb and RC/LAC-Mn glass groups are proposed in Gliozzo et al (2015a). The samples included in the CaO-rich HIMT are listed in Table 4 Group What emerges is that the CaO-rich (Na 2 O-poor) HIMT materials are: (a) well characterized from a chronological point of view (mainly fourth to seventh centuries AD); (b) mainly distributed (and also produced?)…”

Late Antique and Early Medieval Glass Vessels from Faragola (Italy)

“…The RC‐Sb and LAC‐Sb glass groups (Gliozzo et al . ) include more than 450 Roman and Late Antique colourless samples, dated to between the first century bc and the seventh century ad , and characterized by MnO contents below 0.2 wt%, Sb contents above 500 ppm and a REE pattern (when available) closely resembling that of the Levantine glass. The RC‐Mn and the LAC‐Mn groups (of unknown origin) include 108 Mn‐decoloured samples, dated to between the first and the seventh centuries ad , and characterized by MnO contents > 0.2 wt% and Sb contents < 20 ppm.…”