Duelle
Two goddesses, a pair of beings from the sphere of the sun or the moon and who take the form of women, engage in a strange battle in the bars, hotels, and mystical power-spots of Paris. They fight over the possession of a magical diamond that will allow them to remain on earth.
Starring Juliet Berto, Bulle Ogier, Nicole Garcia, Claire Nadeau, Hermine Karagheuz, Jean Babilée, Elisabeth Wiener, Jean Wiener, André Dauchy, Roger Fugen
Watch "Duelle" on Mubi released in 1976. It's a drama and fantasy movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.