If you're looking for an item in the middle of the price range, take a look at this Monica Vinader Pendant. While the price is very reasonable, this item is an easy wardrobe update. It's also worth taking a look at this Lionette by Noa Sade Pendant. This product is extremely popular and, just as importantly, not very expensive. And do check out this Anna Beck Pendant! It's a very popular item and good value for money.
If you want to treat yourself, then what you're looking for is this John Hardy Pendant. It's more expensive but worth your money. Another product we're drooling over is this Lana Pendant. It's costly but you get what you pay for. You might also want to consider this Lagos Pendant. You won't regret the money spent!