If you're after a thrifty option, your best bet is this Nakamol Choker. It's a popular piece, while not very costly. Another strong contender for your wardrobe is this Mango Choker. While the price of this piece is not too high, it will surely attract a lot of attention. You might also want to consider this Leather Rock Necklace. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're a bargain shopper, you're in luck with this Chan Luu Necklace in stock and waiting for you. You are guaranteed to fall in love with this item.
If you're in a Treat Yo' Self mood, consider this Loewe Necklace - a great luxury choice. While you're at it, also have a look at this Lanvin Necklace. Yes, this item is expensive, but it does not mean it's not worth it.