It seems to me that the ones worn by Princess Mabel are the oldest ones in the collection as worn by Queen Juliana, although I am not entirely sure. The shape might be slightly different. The element on the ear lobs to which the pendants are attached is definitively different, though.
--Previous Message-- : Are the aquamarine pendants worn by Princess : Mabel the same as the aquamarine pendants : worn by Princess Maxima & HM Queen : Beatrix? : : It seems to me that the pendants are : different, but I could be wrong. :