I think the second & the fourth emerald tiara & necklace set is the same.
No,they are not the same.
She got the emerald one already as an engagement present(Maria Pavlovna's tiara and necklace) in 1922(necklace just remodeled year later by Cartier) and was already wearing the whole parure the same year in October at the coronation in Romania....
She got the other new tiara and a matching necklace on totally different occasion-as a present for the birth of King Peter II in September 1923 bought by her husband for that very special occasion-birth of a first child,a son and an desired Heir ...Later,she kept the emerald tiara for herself and just borrowed it to Queen Alexandra on a few occasions,such as the pre-wedding ball of Queen Elizabeth II,while the fourth one she gifted to her and later Queen Alexandra sold it to an unknown buyer,while the emerald tiara was sold to a known buyer-Van Cleef and Arpels...
This 4th tiara could well be this tiara:
I think you forgot to mention the gold tiara.
The golden tiara is mentioned as the first one...
Eric,I would like you firstly to read what I just posted,just in order not to repeat one sentence again and again because you didn't bother to read properly
Thnx