Kate debuted these gorgeous statement earrings in December 2014 during a short trip to NYC.
The original name for these was Silvertone Crystal Earrings. It looks like they have been renamed The Duchess Clover earrings.
According to KJL, these are set in rhodium plated brass and are 12 cttw. Those are cubic zirconias on the 2.75 inch earrings.
The earrings have a main pendant which is designed to look like a four leaf clover. The spaces between the “leaves” are filled in with a single cubic zirconia stud. Two tiny crystals connect a CZ stud (which acts as the post) to the rest of the earring. At the bottom, two similarly small crystals align downward and connect to a baguette shaped crystal, which in turn is connected to a small triangle-shaped, CZ encrusted ornament. The triangle-shaped ornament finishes off the earring. There is a baguette shaped crystal inside the triangle.
Here they are on Kate. She wore them to a private dinner engagement in NYC.
The cost of these earrings is $175 USD.