Edit: If I recall correctly, some of the emerald gifts from Delhi were known ahead of the Durbar. Of course, Queen Mary seemed capable of adapting any piece of jewellery in one way or another. However, her crown was all diamonds and I feel it was meant to stay diamonds.
--Previous Message-- : Was it given to her before, during, or after : the appearance of the king and queen in : their royal attire and headpieces? :