Madeleines earrings from the new official portrait are the diamond drops from the Connaught diamond tiara. She also wore them to Princess Estelles christening. She has also worn the diamond drops on a chain as a necklace.
Princess Madeleine in October 2012 - new official portrait
Princess Madeleine wearing the diamond drops as a necklace
Princess Madeleine wearing the diamond drops as earrings to Princess Estelles christening