natürlich! (SWR) - The sand collector (TV documentation)
UNDER CONSTRUCTION
Documentary about my sand collection (4 min)
Daniel Helber from Stuttgart has an unusual hobby: he collects sand from around the world. He has been archived at home 6,000 different types of sand.
https://www.youtube.com/watch?v=aiqJrtL3oF0
https://www.swr.de/natuerlich/
http://www.swr.de/natuerlich/sand-aus-aller-welt-der-sandsammler/-/id=100810/did=16118584/nid=100810/1s2ascg/index.html
http://swrmediathek.de/player.htm?show=187a25d0-560d-11e5-891d-0026b975f2e6
