“It has been challenging but we have learned so much from aluminum,” Ms. Hemmerle said. “Sometimes you need to walk through a new door to find out what is behind it.”

In the construction of the earrings, Mr. Hemmerle said, art connoisseurs may find echoes of the art of Agostino Bonalumi, Paolo Scheggi and Enrico Castellani, postwar Italian artists known for their spatial experimentation and whose work inspired the jewelry.

“The Hemmerles use cultural themes as the inspiration for their unique collections,” Max Fawcett, the head of jewels at Christie’s Geneva, wrote in an email. “They have created their own