I absolutely adore Anna Dello Russo's outfit. I love the deep plum plumage of the skirt with the tissue thin lilac knit top, they meld together perfectly. And the necklaces... at first glance I thought they were Ethiopian Coptic crosses and was so excited that she layered two of them, unfortunately, they are not. But if she had it would have been a great touch. I included an example of Ethiopian Coptic crosses below, just in case you are unfamiliar with them.
Carol Marie Double Ethiopian Cross Necklace in Oxidized Silver @ Singer22.com