I don't think the emerald version looks that great. I love the original pearl version but would very much like to see the emeralds used for another tiara. Maybe restoring the Dehli Durbar tiara to it's original state would suit them better. They are too big for the Vladimir Tiara.
It would also create another big parure for British queens. If the Emerald Durbar tiara is combined with the grand emerald necklace HM was given (not the one queen Mary got for the Durbar as i find that hidious). HM allready owns a stunning ruby set now she's inherited the circlet from her mother and she could add the pearl necklace her mother used to wear with the Vladimir tiara in pearls. She allready has an impressive aquamarine parure and several all diamond pieces that can be worn as parures. The saphire tiara is less succesfull in my opinion and would look better as a necklace. Maybe the necklace and earrings she received for her wedding look better with the saphire tiara of Empress Maria Feodorovna.