Ferrierite is a rare magnesian zeolite, which first was found by Graham (1918) on the north shore of Kamloops Lake, British Columbia. A new occurrence of ferrierite was found now at Albero Bassi, by the stream running along the boundaries of the administrative areas of Santorso and Tretto [see Tavoletta (map) Schio, F° 36 II S.E. of the Istituto Geografico Militare] in the province of Vicenza, Italy. In a green weathered porphyrite near Albero Bassi, there are several fractures, a few millimeters thick, filled with a red material occurring also around the edge of the calcite masses which appear in the same porphyrite. This material is composed of a lamellar mineral, whose powder pattern agrees closely with that published by Staples (1955) for ferrierite.

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