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Table 2 Chemical compositions of inclusive phases in the Nanhai I shipwreck beads

From: Characterization of glass beads from Nanhai I shipwreck and new evidence of lead tin yellow type II in China

  PbO SiO2 SnO2 K2O Na2O Al2O3 Cu2O
Pb-Sn-Si phase in the yellow bead 68.36 13.49 16.32 1.27 0.26 0.29
K-Sn-Si phase in the yellow bead 11.21 38.16 30.28 20.28 0.08
Matrix of the yellow beads 63.56 30.86 1.75 3.3 0.32 0.21
K-Sn-Si phase in the orange-red bead 12.69 42.57 23.88 19.63 1.24
Cu2O particle in the orange-red bead 20.12 6.62 4.72 1.13 0.22 67.18
Matrix of the orange-red bead 45.80 36.06 0.06 6.80 0.68 0.28 10.31