I've lost some pieces and a few times I was lucky enough to find them.
Had a10K link chain that I bought when I was a poor college student and loved it. Lost it when my kids were little. Years later kids were in middle school/HS. Guy came to work on our washing machine and found it wrapped around the center agitator thingy once he took the plastic cover off.
I lost an EG hoop brushing my hair in the bathroom at work. It was turned into the office.
My son was a toddler and he took my rings and bracelet, stuck them in a grocery bag and put it in the cabinet under the sink. No idea why. Took a long time to find them but thankfully I did.
Thought I lost a tiny herringbone necklace but found it a year later in the tray of a jewelry cleaner that had gotten pushed to the back of the bathroom cupboard.
Lost a cute gold pinky ring at the movie theater when I got cold and sat on my hands to get them warm. Lost an earring when it got knocked off the end table into the plush carpet. Never found it.
A friend of mine lost a ring and found it in the cuff of her pants! I thought I lost my sister's ring but found it stuck up under the lid of the box I'd stored it in. Lost years off my life before I, by chance, turned the lid over and spotted it. ugh.