If you're on a thrifty budget, this Betsey Johnson Pendant will fit the bill. It's a popular choice, while not very expensive. Another strong contender for your wardrobe is this Pendant. While the price of this item is not very high, it will surely attract a lot of attention.
If you're looking for a happy medium, why not opt for this EFFY Pendant. While the price is very reasonable, this item is an easy wardrobe update.