Andesitic Pumice

Oxide	Analysis	Formula
CaO	4.74%	0.49
K2O	2.42%	0.15
MgO	1.94%	0.28
Na2O	2.42%	0.22
Al2O3	17.70%	1.00
SiO2	60.56%	5.81
Fe2O3	3.93%	0.14
LOI	6.29%	n/a
Oxide Weight		540.02
Formula Weight		576.27

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Materials

Volcanic Ash
Powdered volcanic ash is used to make ceramic glazes, some varieties have a chemistry similar enough to glaze that high percentages can be employed.

Data

Dry M.O.R. (50% Silica)	304C

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