Princess Charlene of Monaco wears the Baumer Aigrette for the dinner following her wedding to Prince Albert II, July 2011; more on the ornament over here!

Princess Caroline of Monaco wears the Cartier Pearl Drop Tiara along with a diamond fringe necklace for the pre-wedding gala in Luxembourg, October 2012; the tiara, which once belonged to Princess Charlotte of Monaco, is now owned by the Palais Princier Collection

Princess Caroline of Monaco wears a converted sapphire necklace from her collection as a tiara at the gala dinner following the wedding of her brother, Prince Albert II, and Princess Charlene, July 2011