Apophyllite

This superb crystal was sold to David Stoudt in 1991 by the Zweibels. It later found its was to the Phillip Potter collection  via the Rocksmiths (all labels included). You just dont see these anymore. The Apophyllite crystal measures 4.2cm long, 2.8cm across and 2cm to where it rests on the largest stilbite. The color is intense.

Locality: Nasik, Maharashta India

Composition: hydrated potassium calcium silicate fluoride hydroxide