http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 DVD-video (58 min.) : sound, color ; 4 3/4 in.
Examines the physical properties of crystals including gemstones. Explores color, light emission and the contrast between incandescence and laser action.
The Royal Institution ; director, Susan Thorne.
"The Royal Institution Christmas lectures."
Presenters, John M. Thomas and David Phillips.
Camera supervisor, Frank Hudson ; videotape editor, Chris Williams.