Chocolate' flint : 2D documentation Upper Jurassic
Banded flint : 3D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Chocolate' flint : 3D documentation Upper Jurassic
Jurassic flint : 2D documentation Upper Jurassic
Cretaceous flint from Rijckholt-St.Geertruid mine : 3D documentation Upper Cretaceous (Maastrichtian)
Chocolate' flint : 2D documentation Upper Jurassic
Cretaceaous flint from Brzoza village : 3D documentation Upper Cretaceous
Szentgál radiolarite : 3D documentation Middle Jurassic
Chocolate' flint : 3D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic