Thank you Arthur. I can now see, despite the grainy photo, that it is the tiara. I had never realised it could be worn as a necklace.
I am glad that others have a better eye than I have.
--Previous Message-- : On her pre-wedding ball picture, I think that : Queen (then Princess) Sofia wore the : Mellerio Floral tiara, which is convertible : as a necklace. : : As far as I know, it is the only time Sofia : has worn this tiara as a necklace. : : Another better view for this pre-wedding : gala: : : : : And here worn in its usual tiara version, : for a Chilean State visit in 2011 (the last : time Queen Sofia wore this tiara, if I am : not wrong): : : : Queen Sofia of Spain attends a Gala Dinner : honouring Chilean President Sebastian Pinera : at the Royal Palace on March 7, 2011 in : Madrid, Spain. (March 6, 2011 - Source: : Carlos Alvarez/Getty Images Europe) : : :