Something like this:
http://www.nastygal.com/accessories-jewelry/athena-necklace
http://www.nastygal.com/accessories-jewelry/station-leather-necklace
http://www.nastygal.com/accessories-jewelry/mixed-metal-station-necklace
http://www.nastygal.com/accessories-jewelry/uxmal-necklace
http://us.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=0&viewAllFlag=&catalogId=33060&storeId=13052&productId=4691252&langId=-1&sort_field=Relevance&categoryId=208714&parent_categoryId=208582&pageSize=200&refinements=category~[210064|208714]&noOfRefinements=1
I would go for the black belt :) I think this bracelet would look nice with it too : http://www.forever21.com/Product/Product.aspx?BR=f21&Category=acc_bracelet&ProductID=1000047419&VariantID=
or this ring: http://www.forever21.com/Product/Product.aspx?BR=f21&Category=acc_rings_pins&ProductID=1011409334&VariantID=
or you can wear those 2 together : http://www.forever21.com/Product/Product.aspx?BR=f21&Category=acc_jewelry&ProductID=1000042056&VariantID= and
http://www.forever21.com/Product/Product.aspx?BR=f21&Category=acc_rings_pins&ProductID=1000046887&VariantID=
you can put this in your hair: http://www.forever21.com/Product/Product.aspx?BR=f21&Category=acc_hairgoods&ProductID=1002930181&VariantID=
hope this helped :)