On Jewelry Earrings

I just do not know if I should invest on costume jewelry earrings. I always lose the back portion of the earring. You know the thing that locks the earring in place?  Sometimes, since I can no longer find them, I no longer wear them or even if there are still a couple of pieces that are intact I refrain from wearing them so as not to lose more of them. I hope jewelry stores sell just the back portion of the earring. Hehehehe. So yeah it is probably a good idea if I use costume earrings first. Nobody will know the difference anyways especially if I get them from Holsted Jewelers. In fact, some of them might even ask me where I bought it because some of their costume jewelry pieces are really fine ones.