Natrolite, Phillipsite Subgroup
Weilberg, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
6x8x4 cm specimen with a vug lined with radiating Natrolite-Needles and very small Phillipsite. According labels Ex collection Kalscheuer, Bonn. Most likely from prior 1925. Zeolite collection of Volker Betz.
© Volker Betz (2010)