vein

Spain, Catalonia, Cap de les Penyes Blanques. Granodiorite and granite with quartz veins. Upper Carboniferous - Low Permian.

Spain, Catalonia, Platja d'Aro. On the left is granodioorite porphyry with quartz and aplite veins. On the right is a diorite porphyrite dyke with quartz veins.

Sardinia, Monte Corrasi. Calcite vein in Middle-Upper Jurassic dololostones.