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Table 1 Chemical compositions of Nanhai I shipwreck beads (w%)

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

MgO

CaO

CuO (blue beads)/Cu2O (red beads)

Fe2O3

Small opaque Yellow beads (n = 5)

59.14

32.40

4.38

3.66

0.23

0.19

SD

1.94

1.67

0.47

0.56

0.21

0.13

Large opaque Yellow beads (n = 5)

57.38

34.72

3.12

4.27

0.34

0.16

SD

2.03

1.92

0.30

0.20

0.15

0.09

Opaque orange-red beads (n = 8)

46.37

32.62

1.39

8.40

0.26

0.47

0.08

0.48

9.40

0.54

SD

1.06

1.21

0.46

0.75

0.29

0.32

0.11

0.36

1.50

0.22

Transparent blue beads

(n = 2)

45.51

40.47

8.34

0.77

0.44

0.24

3.34

0.75

0.16

SD

0.06

0.41

0.05

0.11

0.05

0.04

0.24

0.01

0.16

Transparent light red beads (n = 6)

51.23

39.34

7.17

1.16

0.25

0.08

0.03

0.55

0.20

SD

2.30

1.67

1.05

0.53

0.13

0.08

0.04

0.17

0.08

Translucent Dark red beads (n = 4)

63.44

32.36

0.47

0.22

0.45

1.64

1.42

SD

1.14

1.13

0.03

0.10

0.06

0.10

0.10