Yes Melina. She wore this necklace before, Sept. 2008 in USA.
Detail:
http://img56.imageshack.us/img56/8360/qraniasdh3.jpg
I think these earrings are not a set with the necklace, it is only my opinion.
Queen Rania has similar earrings.
Queen Rania: Earrings 2006
http://i34.tinypic.com/syxts4.jpg
Love the circle/geometric diamond earrings on Queen Rania, thanks for posting them for us to drool over!