I’ve never really given this much thought, but pairing your jewelry with your neckline certainly makes a difference! Your necklace choice should compliment your outfit; the neckline of your shirt or dress being the most important thing to consider.
How to choose necklaces to complement necklines. Somebody just explained what I already do! :D Except you could wear a tiny pendant on a delicate chain with that eggplant shirt on the bottom left. And it's "Collared" shirts, not "Collard.
How to Choose the Right Necklace for Different Necklines: A Visual Guide