Diamonds Are Brittle
Overview
Bernard Noblet is a modest bank clerk with a passion for billiards. His fiancée Juliette, a schoolteacher, dreams of one day living the high life, and his best friend Roger, a little-known inventor, is equally despairing. After careful consideration, a solution emerges: a cleverly organized hold-up will enable them to live in luxury for the rest of their lives. Bernard soon makes the acquaintance of Bettina and her mother, Madame Ralton, professionals in the "heist" business.
Cast

Jean Seberg
Bettina Ralton

Claude Rich
Bernard Noblet

Elsa Martinelli
Juliette

Elisabeth Flickenschildt
Madame Ralton

Günther Jerschke
Goretti

Ady Berber
Max

Walter Roderer
Cuendet

Pierre Vernier
Roger

Jacques Morel
Amédée de St. Leu

Jean-Paul Moulinot
Jeweler

Jacques Balutin
Agent

France Rumilly
Lady with the ring