Thank you so very much, Lorenzo, for spoiling us with the pictures of this lovely jewel. I'm always interested to see the backside of this kind of jewellery to see how they can be changed. I sincerely hope that the original jeweller or another will be able to create a new frame for the necklace for that it could be worn as a tiara again one day - in opposition to the opinions of other posters I think it'll make a lovely, delicate tiara .
For the 'pigtail' hook - might it be possible, that the two longer pendants of the garlands are thought to be hung on either side of the brooch? Could there be originally more (two) of this tiny hooks?
Anyway, a lovely jewel and I imagine you and your family treasure it . Thanks again for sharing with us!