Summer Showers Bring... Metals??

So last night in my sims game there was this huge thunderstorm (in summer) and it was the first one I've encountered in the Sims 4 Seasons. This morning (again, in-game) I noticed a random object lying in my sims' backyard while she was making breakfast. I hovered over it and here it was a metal collectible. Not only that but it was Sadnum, one of the rarest metals, just laying there behind the house!!! I picked it up and put it in my sims' inventory and like that, I had a super rare metal; no digging or searching necessary. I know that it didn't somehow get dragged out of one of my sims' inventories because I've just started this save and I've barely dug up any rock/dig sites. Plus, I just checked and it's not counted towards my collections which means that none of my sims had found it, it was literally just laying on the ground. Was this because of the thunderstorm? There was intense lighting for sure but I hadn't heard of that spawning collectibles... Has this happened to anyone else? I'm really curious so comment down below if you haven't had it happen or you've never heard of it. On the flip side if this has happened to you or if you've heard that it can happen, definitely fill me in. That would be such a cool feature if thunderstorms/lightning could spawn metals and this wasn't just a series of coincidental events :joy: