If I might offer some insight here. I think that the brooch in Kelly is the Cambridge Pearl. We discussed a few threads below about the proportions of the brooches as many people (including myself) think that the brooches look out of proportion. The brooch looks smaller because it is reproduced at only 60% of its actual size. See the following thread for additional reasoning.
Hope this helps Cheers! Bryce --Previous Message-- : Thank you, Baxter (and GillW and Renske as : well)! : : Do you know if the round pearl and diamond : brooch pictured in Angela Kelly's book : Dressing the Queen - The Jubilee Wardrobe , : at the top right of the double page : picturing a series of the Queen's brooches, : is also the Cambridge pearl and diamond : brooch? (page 81 of A. Kelly's book, it is : the brooch on the right on this picture : posted earlier by our fellow poster Joye: : http://members2.boardhost.com/royal-jewels/msg/archive/1353125849.html : ). The brooch in Kelly's book seems smaller : than the Cambridge pearl brooch, but I am : actually not sure. : : : --Previous Message-- : That is indeed the Cambridge brooch. The : greyness is due to the photo processing. : : : : : :