Heritage Science

Table 1 Chemical compositions of glass compound eye beads excavated from Hejia village of Zhoulin (wt%)

From: Scientific analysis of two compound eye beads unearthed in Hejia Village, Zhouling

Sample	1						2
Region	Matrix			Regolith			Matrix			Regolith
Content	1	2	3	1	2	3	1	2	3	1	2	3
Na₂O	0.65	0.37	2.03	0.08	0.83	0.68	0.75	0.87	1.25	0.78	0.61	0.81
MgO	0.26	0.58	1.04	0.01	0.98	0.87	0.01	0.15	0.50	0.01	0.19	0.19
Al₂O₃	0.50	1.10	1.96	0.02	1.84	1.64	0.01	0.29	0.95	0.01	0.36	0.36
SiO₂	77.42	77.54	73.71	70.12	41.28	35.35	79.07	78.64	79.97	71.62	71.81	75.92
P₂O₅	0	0.06	0.22	0.33	2.27	2.26	0.60	0.58	0.01	0.64	0.88	0.05
K₂O	2.05	2.32	1.74	1.70	0.51	0.35	1.12	0.89	1.64	0.66	0.96	1.55
CaO	1.33	1.54	1.71	3.33	2.22	2.14	0.98	0.84	1.12	0.88	1.06	1.18
TiO₂	0	0.02	0.11	0.37	0.44	0.66	0	0	0	0.03	0.03	0.04
V₂O₅	0.09	0.10	0.11	0.10	0.15	0.26	0.05	0.06	0.04	0.06	0.05	0.07
MnO	0	0.12	0.64	2.38	2.06	1.87	0	0	0	0.36	0.35	0.31
Fe₂O₃	0.74	1.25	1.80	2.79	1.07	1.10	0.72	0.43	0.74	0.57	0.71	0.99
CuO	0.64	0.39	0.40	0.27	0.29	0.21	0.89	0.84	0.79	0.64	0.60	0.75
ZnO	0.03	0.01	0.01	0.01	0.02	0.01	0.02	0.02	0.02	0.01	0.01	0.02
SrO	0.13	0.46	0.66	0.56	0.67	1.06	0.08	0.08	0.10	0.12	0.11	0.12
SnO₂	0.09	0.10	0.06	0.16	0.54	0.45	0.05	0.16	0.24	0.77	0.72	0.41
Sb₂O₃	0.03	0.07	0.04	0.08	0.14	0.24	0.05	0.03	0.03	0	0	0.01
BaO	6.74	6.19	5.91	5.90	13.24	21.72	3.72	5.47	1.65	3.28	1.99	3.08
PbO	9.29	7.80	7.86	11.80	31.44	29.13	11.88	10.64	10.93	19.57	19.57	14.14

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