If you are on a tight budget, your best bet is this Elizabeth and James Necklace. It's a fantastic piece, while not very pricey. Another strong contender for your wardrobe is this Kendra Scott Necklace. While the price of this piece is rather reasonable, it will definitely attract a lot of attention. You may also want to look at this Dannijo Choker. This item is not expensive either, but it will make a difference in your wardrobe.
If you can afford to spend a little more, take a look at this Necklace. While the price is very reasonable, this product is an easy wardrobe update. You can also check out this Kendra Scott Necklace. It's an attractive option both price and quality-wise. Take a look at this Anna Beck Necklace too! Great value for your money.
If you want to splurge, then you won't be disappointed if you check out this Lanvin Necklace. It's a costly but smart option. While you're at it, also have a look at this Jacquie Aiche Necklace. Yes, this item is expensive, but it does not mean it's not worth it. And how about the luxurious Gurhan Necklace? Yolo, right?