Pair an open-collar blouse with a thicker, chunkier piece of costume jewelry. Faux silver or gold interlock chains that lie flat on the collarbone accent a dressy casual outfit or business suit. Coordinate your earrings and belt with the tones in your necklace.
Enhance a jewel-neck or turtleneck sweater with a long string of colorful beads. Precious stones work well with a thicker day look, while crystals bring a little glamour to an evening ensemble.
Pair a square-neck top with a pendant that dangles from a long chain. Consider lengths that fall between the collarbones.