SiO₂

Al₂O₃

Fe₂O₃

K₂O

TiO₂

MgO

CaO

Na₂O

49.90%

29.81%

7.19%

4.47%

3.39%

1.46%

0.83%

0.50%

ZnO^*

Cr₂O₃^*

NiO^*

As₂O₃^*

PbO^*

CuO^*

CdO^*

HgO^*

187.50

111.79

56.89

205.23

7.70

17.16

1.02

0.40