Crude Stone Tool?
Rock.
A sex stone: friggin rock.
Crude Stone Tool?
Yes...if it is the same one I picked up & used one day, because it was handy.
Sometimes a handy stone of the right size & configuration can save me a long walk back to the barn or a campsite to get a REAL tool. Use it once & throw it away; they get the job at hand done a little quicker than other wise.
Call them "a tool of opportunity".
I've pounded on several different things with a lot of different rocks in my time, but that didn't make them "hammer stones", either.
Then I bought a good pair of fence tool pliers & scabbard.
Now about the only thing I use rocks for is to throw at the deer raiding the bird feeders. Oh, and when I run out of used sparkplugs rock fishing, I'll tie on a rock, since I hate tossing perfectly good, expensive lead into the ocean. Finding one with a hole through it isn't hard.