Christian Dior Pins & brooches Multiple colors

It is quite possible to attribute this brooch to the designer Roger SCEMAMA for Christian Dior (C.D died in 1957)

Famous French parurier, Roger SCEMAMA begins his jewelry creations at the beginning of the years 1920 in Paris, for Maison Schiaparelli. After the war, he designs his jewelry for the biggest French fashion houses. Respecting the spirit and identity of each, it is ultimately for Christian Dior that his creations will be most recognized, working mainly with the rhinestones and drawing inspiration from the shapes and frames of ancient jewelry. His style both baroque and naturalist, as well as its color associations, often daring, are very recognizable, and are today a great classic of couture jewelry. The attention to detail brought to each of his creations and the quality of his work make Scemama one of the greatest creators of post-war jewelry..

Description:
golden metal frame, made of blue pearls (glass or enamels?) coming to form a crown , on which an interlacing of rhinestones comes to rest delicately on it.
Punch on the back, where we can read:
for Christian Dior (since he died in 1957)
Made in Germany.
In excellent condition.