wisskirchen-crystals

Firing is to cone 10 in oxidation.

inside

outside

Empirical Formula wisskirchen-crystals

K2O        0.1
Na2O       0.24
CaO        0.62
MgO        0.04

Al2O3      0.48
Fe2O3      0.3

SiO2       3.48
TiO2       0.03

molecular percent Silica 65.8%

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