I'm in love with this pretty Pirouette Necklace ($44) by Gold Hearted. It comes in black, red, sea foam green, and pearl. But obviously the pearl is my favorite! The materials are super high-quality so you won't get any skin issues or metal discoloration. You can change the chain length just by making a note of it when you checkout.
And.... as if you needed any other reasons to scoop yours up right now.... shipping is under $5 no matter where in the world you are! Score!