We were very poor so we got very little as children... but when I was 12 or 13 my mother bought me a Gold signet ring.. nothing was more precious that she'd ever given me.
I was at Girl Guides, and we weren't allowed to wear jewellery so on inspection I was told to take my ring off.. which I did and put it into my shirt uniform pocket.
I didn't realise that the pocket wasn't buttoned, and when I got home, while chatting with my mum I bent over for something , and the ring fell out onto the floor..
There was no carpet on the floor, and we both heard it fall.. but we searched and searched and the ring couldn't be found. A year later we moved house, and even when the room was emptied of everything we couldn't find the ring...