If you're after a thrifty option, this Nadri Necklace will fit the bill. It's a great choice, while not very pricey. Another strong contender for your wardrobe is this Loren Hope Necklace. While the price of this item is rather reasonable, it will certainly attract a lot of attention. You might also want to consider this Givenchy Necklace. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, consider buying this Kate Spade Necklace. While the price is very reasonable, this item is an easy wardrobe update. You can also check out this Necklace. It's an attractive option both price and quality-wise. Consider this Fallon Choker Necklace too! Great value for your money.