The changes made to the necklace in Beth's post above were in my opinion more successful that the alterations to the strands of pearls and emeralds. I quite like the longer version better.
Alice had made slight changes to the strands much earlier.
Here we can see just after the wedding that they were worn the way they were presented. One strand was much shorter than the other and fit close to the neck. (Notice in the photo above the shorter strand is not displayed with the clasp fastened as the other strand is, thus making it appear longer.) However a few years later they had been restrung to reduce the difference in length.