Taking a closer look at GD Maria Teresa necklace and the GD of Baden one's, it is most likely the same necklace and probably was aquired by the Luxembourg House . There was a connection with the first owner by GD Josephine Charlotte who was a distant cousin of Pcess Genevieve d'Orleans, Marquise de Chaponay the last owner. I am not convinced that the current bandeau turquoise tiara the last time seen on Pcess Tessy has nothing to do with GD Maria Teresa grand necklace. The side by side comparison below to me indicates that there is similarity between the clusters and also the diamond prongs.
If this is established we have no good hope to see the necklace worn again by GD Maria Teresa
--Previous Message-- : If I remember correctly, there was once a : comparison of this turquoise necklace and : the new turquoise tiara posted (by Tamara?) : which made quite clear that the tiara was : not created from the necklace, and not from : its pendants either. : Perhaps someone saved those pictures? : : --Previous Message-- : I don't thinnk that the necklace is : transformed in a bandeau because the : necklace worn with the bandeau looks a lot : like the original necklace, only without : pendants : : :