Our final interview before we say farewell to the lab. Here Jeff Post is giving us wonderful descriptions of the formation and structure of mineral crystals. We had a lovely sending off and hope we can do justice to the generosity of knowledge, time and inspiration people have shared with us here. A few more trips, screenings and an exhibition before we can get back and start pulling all the work together. We have invitations to come back and will have a chance in March 2011 to come and show the lab. some work in progress.