The silver clip on earrings have not been worn in ages, thought I'd throw them back in rotation so I tried them on. Stop, a blue stone is missing. So I think "nobody will notice". Wrong, if you can see the flaw, even though it's a small one it will not add to your look, but detract from it. Don't tell me you'll wear it with your hair down. Either replace that blue stone flawlessly or out they go. You really don't want to spend your evening covering your ear. It's the little things.
Another example is this pair of gold toned earrings, look at the picture on the left. Can you see the slit from where the earring hangs ? Now look at the picture on the right, the slit cannot be seen, the earring is positioned on the middle of the lobe and looks more polished. If the earring does not stay in place, reconsider them. The same for tarnished ones or worst, those that turn your skin green. You will not look focused if you are touching your ears all day setting the earrings back in place.
Small adjustments can make a difference. Start small, check your earrings, try them on, how do they feel ? Will those clip ons be removed in the middle of dinner because they're too tight ? Adjust them, check out this tutorial here to loosen them, you won't look polished with red earlobes and dainty vintage Chanel earrings placed on the table next to your glass of red wine.