A small Bavarian village is renowned for its "Ruby Glass" glass blowing works. When the foreman of the works dies suddenly without revealing the secret of the Ruby Glass, the town slides into a deep depression, and the owner of the glassworks becomes obssessed with the lost secret.
You can now watch Heart of Glass online on the following streaming providers in the United States.
| Directing | Werner Herzog | Director |
| Writing | Werner Herzog | Writer |
| Writing | Herbert Achternbusch | Writer |
| Directing | Regine Krejci | Script Supervisor |
| Camera | Jörg Schmidt-Reitwein | Director of Photography |
| Camera | Michael Gast | Camera Operator |
| Camera | Gunter Freyse | Still Photographer |
| Lighting | Alfred Huck | Lighting Supervisor |
| Art | Cornelius Siegel | Production Design |
| Art | Henning von Gierke | Set Designer |
| Art | Cornelius Siegel | Set Designer |
| Costume & Make-Up | Gisela Storch | Costume Design |
| Costume & Make-Up | Ann Poppel | Costume Design |
| Editing | Beate Mainka-Jellinghaus | Editor |
| Editing | Angelika Dreis | Editorial Production Assistant |
| Sound | Haymo Henry Heyder | Sound Designer |
| Sound | Peter van Anft | Sound Designer |
| Sound | Popol Vuh | Music |
| Production | Joschi Arpa | Location Manager |
| Production | Walter Saxer | Production Manager |
| Production | Werner Herzog | Producer |
