Gypse, Hourt, Grand Halleux, Belgium

                                                                               Ech. XX4

2 x 1,6 mm                                                                                                                          

1 x 0,8 mm                                                                                                                          

1 x 0,8 mm                                                                                                                          

1 x 0,8 mm                                                                                                                          

Pour d’autres minéraux, retour à Hourt