Nothing to do with her jewels, but a bit of a news update is in order today...
Buckingham Palace announced that the Queen has been admitted to King Edward VII Hospital in London after suffering from symptoms of gastroenteritis. They're stressing that this is a "precautionary measure" and that she is otherwise in "good health and good spirits". She's expected to stay for a couple days. In the mean time, her engagements for the week are all being cancelled or postponed - including a planned official trip to Rome.
Feel better soon, Your Maj!