French Crystal Onyx Diamond Door Knocker Earrings

A pair of frosted rock crystal, diamond and onyx earrings. Jean Claude Duhem. French. Of door knocker design, suspending a triangular frosted rock crystal drop, enhanced with pavé set diamonds and black onyx trim, suspended from a similarly designed surmount. Diamonds weigh approximately 3.70 carats. With maker’s mark. Numbered 1697. Length is approximately 2 1/4 inches, gross weight is approximately 56.3 grams.