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Hyalite - Valec - Czech Republic
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Hyalite - Valec - Czech Republic

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Valeč (Waltsch), Doupov (Duppau), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic


Sample description

Glassy hyalite aggregates on the volcanic tuff matrix.

Size of this specimen is 25 x 30 x 25 mm.

Chemical composition - SiO2.nH2O


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