Was Beyonce wearing Bunny Mellon's Cartier Riviere Necklace?

Was Beyonce wearing Mrs. Bunny Mellon's diamond riviere necklace at the Vanity Fair Oscar party?

I know the necklace has been credited as a Lorraine Schwartz piece, but the similarity is striking and I am inclined to believe that it is the 1948 Cartier riviere from the Sotheby auction last November.  The necklace sold for $2,797,000...

xo, Juliana

A special thank you to a very savvy reader of the RARE vintage blog, who pointed out that Bey was most likely wearing Mrs. Mellon's necklace...