- Country: Spain
- Genres: Drama
- Release: 1963-11-27
- Director: Julio Buchs
- Writers: Julio Buchs , Jaime García Herranz , José Luis Martínez Mollá
- Language: Spanish
- Stars: Arturo Fernández , Susana Campos , Ángela Bravo , Roberto Camardiel , Alfonso Godá , José María Caffarel , Ángel Ter , Pilar Gómez Ferrer , Juanita Giménez , Armando Balboa
- Runtime: 102 min
- Awards: 3 wins
- AKA: Piedra de toque (France, French Republic) , Piedra de toque , Piedra de toque (Spain)
- Plot: The son of don Enrique Rivera, a wealthy businessman with immense properties in Equatorial Guinea, Carlos is a young man as handsome as he is carefree. He maintains a romantic relationship with Dora, his father's beautiful secretary. However, don Enrique, unaware of his son's feelings, asks Dora to marry him. The young woman, fed up with Carlos's lack of commitment, accepts the widower's proposal. When Carlos receives the news, he decides to go to Africa trying to forget Dora and the love disappointment that has broken his heart.
- IMDB:tt0057412
Piedra de toque Cast · · · ALL
Julio Buchs
Director
Arturo Fernández
Carlos Rivera
Susana Campos
Dora
Ángela Bravo
Elena
Roberto Camardiel
Montoro
Alfonso Godá
Don Enrique Rivera
José María Caffarel
Lino Salazar
Ángel Ter
Barman
Pilar Gómez Ferrer
Asistente al Balele