I suspect it is a brooch attached to a riviere. It shows a marked tendency to twist about, which can happen when the vertical pin of a brooch is looped over the spacing of the collets on a riviere.
--Previous Message-- : Real stuff, my opinion also. And I love this : Vivienne Westwood gown on HRH . : : Here a back-view (from another appearance in : this gorgeous gown) : : : : http://i.dailymail.co.uk/i/pix/2010/02/26/article-1253805-08786121000005DC-874_306x637.jpg : : --Previous Message-- : I agree. Her jewelry cassettes must look : like : Ali Baba's cave... no reason to wear paste. : : : : :