Table 1 XRF analysis results of three Go stones (Values are presented as mean ± standard deviation.)

White stone

1

4.75

1.76

0.31

2.69

0.10

90.16

\

0.17

0.05

2

2.16

2.32

1.19

3.04

0.21

90.86

\

0.08

0.14

3

4.15

1.82

0.23

2.57

0.11

90.90

\

0.18

0.04

4

2.59

2.44

1.27

3.02

0.20

90.25

\

0.08

0.14

Mean ± SD

3.41 ± 1.24

2.09 ± 0.34

0.75 ± 0.58

2.83 ± 0.23

0.16 ± 0.06

90.54 ± 0.35

\

0.13 ± 0.06

0.09 ± 0.05

Black stone

1

2.26

29.65

59.73

\

1.64

1.78

2.15

\

2.80

2

1.91

30.68

59.36

\

1.58

1.68

2.10

\

2.67

3

2.08

30.65

58.70

\

1.44

3.14

1.03

\

2.97

4

1.99

30.15

59.34

\

1.40

3.15

1.02

\

2.94

Mean ± SD

2.06 ± 0.14

30.28 ± 0.43

59.28 ± 0.39

\

1.52 ± 0.11

2.44 ± 0.82

1.58 ± 0.64

\

2.85 ± 0.14

Patterned stone

1

1.57

35.73

54.77

1.10

1.10

1.80

1.38

\

2.54

2

1.20

36.55

54.10

1.36

1.06

1.92

1.33

\

2.47

3

1.53

36.64

54.68

0.85

1.06

1.52

1.31

\

2.40

4

1.40

35.68

54.13

1.63

1.09

2.03

1.41

\

2.60

Mean ± SD

1.43 ± 0.16

36.15 ± 0.45

54.42 ± 0.33

1.24 ± 0.32

1.08 ± 0.02

1.82 ± 0.22

1.36 ± 0.04

\

2.50 ± 0.08