When it comes to fashion, opposites do indeed attract. One way to create this opposition is with your choice of jewelry. Pairing a demure earring (like those shown bellow from Alexis Bittar) with a tough leather jacket, or a girly dress with a flashy skull necklace creates an interesting look.
Even your jewelry can be a lesson in contrasts. The gorgeous rose gold and rubies in the horn necklace (shown below) by Sydney Evan is the perfect juxtaposition between sweet and sassy.

Alexis Bittar Small Hoop Earring in light sage

Sydney Evan mini rose-gold and ruby horn necklace

Mollie Faith large chain link bracelet with black diamonds

Here's a picture of the always-fabulous Rachel Zoe sporting a gold chain link necklace with diamonds. A statement-making piece for sure.