Origin: Böhling Farm, Indiana, USA
Sample size: micromount
Grayish white illite on matrix
Origin: Schöller
mine, Libusin, Kladno, Czech Republic
Sample size: 3 x 5 cm
Creamy gray
halite casts pseudomorph replaced by illite in Permian Calcareous
Illite shale
Origin: Bohling Farm, West of Auburn, Nemaha Co., Nebraka, U.S.A.
Sample size: 5 x 8 cm
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