This piece is definitely privately owned by the Duke of Braganηa I read in an old interview that Queen Amelia left D. Duarte some Jewels and buildings in Lisbon. The only piece I know from Queen Amelias inheritance is this and a choker, both seldom used by the Duchess. About the earrings in my opinion they look like they came off of the tiara possibly from the ends, or they were made to mimic the design of the tiara. If anyone wishes to see the tiara in a video the wedding of the Dukes is on Youtube in 19 parts here: http://www.youtube.com/watch?v=N6QI5nDbrpA
Queen Amelia with the tiara
And a few photos from the wedding showing how the tiara was placed