: Edit: but but, for the Mandela banquet the : emeralds are behind the circles, aren't : they? :
No, below is a comparison. On the left is a screen grab from the Buckingham Palace banquet with the drops resting on top/in front of the inner diamond frames, particularly noticable in the large central drops. On the right is the Golden Jubilee reception in Toronto with the emerald drops dangling behind the frames: