I agree with 992234177, that it is a very poorly coloured photograph. In fact, I will go further and say it is the worst colouring I have seen.
Look at how the blobs of colour have been put on the diamond bracelets.It is the same for the necklace, earrings, the little crown and the Garter sash. We definitely are not seeing "new" jewels. I also agree with 9922334177 that it is the coronation necklace and earrings under the blobs.