After years of scientific research Thomas Kellner, an eccentric chemist, succeeds in manufacturing an imitation diamond, with the help of his son Jack.
| Actor | Role |
|---|---|
 Alec B. FrancisWynne Browning | Wynne Browning |
 Belle AdairDoris Kellner | Doris Kellner |
 Edward RosemanThe Detective | The Detective |
 Helen MartenNot listed | Not listed |
| JJ. Gunnis DavisCzenki, a Diamond Expert | Czenki, a Diamond Expert |