If you're not planning on spending much, this Kendra Scott Necklace will fit the bill. It's a popular choice, while not very pricey. Another strong contender for your wardrobe is this BaubleBar Necklace. While the price of this product is rather reasonable, it will certainly attract a lot of attention. You might also want to consider this Rebecca Minkoff Necklace. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking at it like an investment piece, then you won't be disappointed if you check out this Meira T Necklace. It's an expensive but smart option. Why not take a look at this Necklace too? Expensive, but worth every penny. And how about the luxurious Konstantino Necklace? Yolo, right?