If you're looking for an affordable item, this Goldenmine Pendant will fit the bill. It's a great choice, while not very costly. You might also want to check out this iBraggiotti Pendant. It's an item you'll love which also doesn't cost the earth. You might also want to consider this JewelryPot Pendant. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're not the one to skimp on clothes, then what you're looking for is this MySolitaire Necklace. It's more expensive but worth your money.