A fine cluster of partly gemmy and well developed, nicely twinned Adularia crystals on matrix from the St. Gotthard Massif of Uri Canton in Switzerland. The crystals here are sharp edged and very lustrous with good terminations. They are rich of faces as well and there is well striations and only minor imperfection at the display face. At the backside was the rock. This fine and old time piece comes with a beautiful antique label.