We have 2 threads where Princess Charlotte is incorporated, but not have a thread on her, or her Jewelry, so here it is:Princess Charlotte of Monaco, Duchess of ValentinoisPrincess Charlotte of Monaco Diamond Fringe Tiara
The diamond fringe tiara belonged to Princess Charlotte of Monaco, the grandmother of the current sovereign prince. She received it from her father, Prince Louis II, as a wedding present in 1920. The piece, which has been attributed to Cartier, may have been inherited by Louis from his mother, Lady Mary Victoria Hamilton.
Mary Victoria was the daughter of a Scottish peer, the Duke of Hamilton, and her mother was a German princess, Marie Amelie of Baden. The fringe tiara is apparently referred to by the Grimaldis as "a iara russe" -- this makes sense given the fringe tiara's design roots in the kokoshnik imperial court of the Romanovs. Ultimately, the provenance of the piece has never been made entirely clear.
It is said that Caroline has inherited the tiara, leaving Grace out, becaus Charlotte supposedly didn't approve of Grace. But at closer inspection Caroline's frings tiara/necklace has different spikes (longer/shorter)