LOI

SiO₂

SO₃

CaO

MgO

Fe₂O₃

Al₂O₃

Total

Volcanic tuffs

5.58

61.63

-

1.23

0.51

11.71

17.01

97.67

Gypsum

25.85

6.08

48.02

15.69

1.31

0.60

0.65

98.2