Hyalite - Valec - Czech Republic

Locality

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 30 x 30 x 20 mm.

Chemical composition - SiO2.nH2O