I have been trying to make sense of some of the information I have collected about Mrs Greville's emerald necklaces.
1. It is very clear from the press that Mrs Greville had at least 2 grand emerald necklaces and perhaps a third.
2. The press also reported that one of the necklaces had cabochon emeralds.
This report is from 1927
I think that this refers to the necklace recently worn by Queen Elizabeth to the Diplomatic Reception.
And that this is the necklace which can be seen in the photo of Mrs Greville at the Austrian Legation concert which I posted some time ago. The dark gemstone areas on the outer edge of the necklace are the cabochons, and as Thomas said the spacing between the squarish emerald motifs looks the same as in the necklace worn by QEII.
Mrs Greville in 1937.
A necklace such as the one worn by QEII makes sense of other press reports which spoke of Mrs Greville wearing a large number of emeralds on her dress. Previously, I had assumed that the reports referred to brooches, and no doubt Mrs Greville had more than one.
Here is another report of "masses of emeralds "which I have not posted previously.
I think that, at least, some of the cabochon emeralds can be seen on Mrs Greville's corsage in photos of her from the Devonshire House Ball.
Below is another, not well known, photo.
Another image.
I know that Maridje has a much clearer image of Mrs Greville (from a different angle). Perhaps that might allow us to see the various items more clearly.
I also think that the necklace (as worn by QEII) might make sense of the so called "chain" of emeralds which the press frequently mentioned being worn by Mrs Greville. I have previously posted different reports of Mrs Greville at the pre-wedding ball for Princess Marina. Some said she wore 2 emerald necklaces; some said she wore an emerald necklace and a chain.
To my way of thinking, the necklace worn by QEII could be worn across the front of a bodice as a "chaine de corsage", as well as a necklace. We know that many well known jewels were used to outline a neckline or as a bodice wide jewel. The examples are numerous.
If Mrs Greville did at times wear this necklace as a "chaine de corsage" that would explain the references to her wearing a great number of emeralds on her dress.