What a fine tunnel piece from Switzerland. Swiss tunnel minerals are so rare and hard to come by due to the relatively small number of produced specimens. Here we have a beautiful plate richly covered with transparent, rhombs of Siderite with just a pale olive colour and partly sugared with glistening golden Pyrite. The Siderite itself is sharp edged, highly lustrous and excellent terminated. This fine piece is both, rare and aesthetic and additional a super opportunity to get hold of such a great specimen. Ex Joachim Hennrich collection.