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Table 3 Results of the EDX analysis for high lead glasses, samples I/18 (green), I/34 (golden) and I/59 (brown), amounts are given in wt%, nd—element was not detected, x—element was detected but not quantified

From: Investigation of coloured lead glass glitter from an early eighteenth century material collection, Cambridge, by electron microscopy/energy dispersive X-ray analysis

  Green flakes—I/18 Gold flakes—I/34 Brown flakes—I/59
Wt% b1 b2 a1 a2 a1 a2 a3 a4
Na2O 2.0 1.9 nd nd 1.3 nd nd 2.1
MgO x x nd nd nd nd nd x
Al2O3 1.4 1.1 x x 1.3 nd nd x
SiO2 37 38 34 35 34 26 26 34
K2O 1.2 1.3 nd nd x x x 1.8
CaO 1.5 1.9 nd x 1.7 1.1 1.0 1.5
MnO x nd nd nd 2.7 nd nd x
Fe2O3 x x 2.6 3.2 nd nd nd nd
CuO 4.0 4.6 x x nd nd nd nd
Au2O3 nd nd x x x x x x
PbO 57 56 66 65 52 73 73 60