For something in the middle of the price range, we recommend opting for this Eddie Borgo Necklace. While the price is very reasonable, this item is an easy wardrobe update. Also consider this Shourouk Necklace. It's an attractive option both price and quality-wise. And do check out this Lulu Frost Necklace! It's a very popular item and good value for money.
If you're gonna splurge, then what you're looking for is this Givenchy Necklace. It's more expensive but worth your money.