Plattenhornstein chert of the Abensberg-Arnhofen type : 2D documentation Upper Jurassic
Plattenhornstein chert of the Abensberg-Arnhofen type : 3D documentation Upper Jurassic
Blok krzemienny 133 [brak danych] mezolit ?
Jurassic flint : 3D documentation Upper Jurassic
Świeciechów flint : 3D documentation Turonian
Jurassic flint : 2D documentation Upper Jurassic
Świeciechów flint : 2D documentation Turonian