Initially I thought that Arthur's suggestion, that the bracelet worn by QEII to the Opening of Parliament was the one photographed in Angela Kelly's book, was correct. Now I suspect these are two different bracelets.
While I can see at least 2 rubies in the bracelet worn to the Opening of Parliament, the one worn on that occasion has 3 diamond motifs between the rubies and the one in Angela Kelly's books has only 2 motifs. It is of course possible that another part of the bracelet might match that in A Kelly's book. Although the precise details of the diamond motifs in the bracelet worn to Parliament are unclear, I feel they are different from the one in Angela Kelly's book.