[kiryandil]

Take a picture of your rock with your phone or a digital camera, and upload it to your computer.

Put the computer location of the picture into your Internet browser URL address line, and do a Goolag image search on the picture.

I've been doing that lately with unknown flowers. Works great.

[MayflowerMadam]

Yes. I’ve used that Google Lens feature on one doo-dad from the farm that made no sense to me. I’d ask most visitors what it was. Nobody knew.

Lens matched it. https://i.etsystatic.com/36568323/r/il/4de2ab/4564563038/il_794xN.4564563038_qu9i.jpg