Below are some press cuttings concerning the 1902 sale. None of them mentions an emerald necklace, much less one of great value. But the first Earl of Dudley was a connoisseur of jewels so it is possible that he acquired the necklace and it was sold at another time.
3 cuttings from the report in the
Daily Telegraph 5 July 1902
Other reports with descriptions.
Apologies. I will try to upload the images later. This new system introduced by Photobucket is the most irritating and difficult system to try to use!!