The top photo with sapphires is photoshopped. The Duchess has only worn this pair once and they are diamond and emerald earrings.
--Previous Message-- : I just saw a photo of the Duchess of Cambridge : in the Royal Watcher tumblr, in the photo : (below) it seems that she is wearing : sapphire earrings but I don't recall seeing : those before. They look a lot like the : emerald earrings she wore on the three-day : trip to New York. : : Could it be that the same earrings with : interchangeable emerald and sapphire? Or is : it just a photoshoped version? : : Emerald version worn on the occasion of the : St. Andrews 600th Anniversary Dinner at the : Met (Dec. 9, 2014) : : : : Sapphire version : (http://royalwatcher.tumblr.com/post/110918276922/54-100-photosets-of-the-duchess-of-cambridge) : : : : : :