Using three necklaces with antique brass tones, I layer them on. What's great about each piece is that they are in descending length. Meaning that one will not completely cover up the other one, but rather fill the space directly below the other. Try to keep one color that is present in all so they will compliment each other, or you can use colors that are different but still compliment eachother. Like blue and green, copper and brass, silver and black.
Play around with this look, try it with bracelets and ankletts. This is a bold center piece, so don't be afraid to get creative! Have fun with it!