I found a very intersting thread of 15 july 2015 from Arthur and Karlimagnus about the jewels of the Belgian Queens.I found a list of the two first Queens Queen Louise and Queen Marie Henriette jewels and what happen to them. King Leopolf II did not repect her wife 's will.
Only Princess Clementine owned some of her Mother's jewels. She was against the Wedding of her Son Louis with Alix de Foresta , to small noblility ! their relationship was bad.
Louis and Alix were seen at a lot of glittering Events of the past and I learned in the thread above that the Princess wore Jewels from her Prince Napoleon paternal grandmother Clothilde de Savoy and not from Princess Clementine.
Alas her jewels were stolen and we don't know what is left now.