20 spécimens de pierre

01-                  Granite

02-                  Gabbro

03-                  Diorite

04-                  Rhyolite

05-                  Andesite

06-                  Tranchyte

07-                  Basalt

08-                  Siliceous Roch

09-                  Marl

10-                  Sandstone

11-                  Shale

12-                  Conglomerate

13-                  Limestone

14-                  Coral Limestone

15-                  Dolomite

16-                  Slate

17-                  Phyllite

18-                  Marble

19-                  Skarn

20-                  Serpentinite