If you're after a thrifty option, this Pieces Pendant will fit the bill. It's a fail-safe choice, while not very costly. Another strong contender for your wardrobe is this Asos Pendant. While the price of this piece is competitive, it will definitely attract a lot of attention. You might also want to consider this NY:LON Pendant. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.