Help me id this rock, please.

[brainfogbetty]

I was recently given a box of rocks that my aunt had picked up all over the US. Inside the box, among all the rough rocks, I found this. I don't know anything about rocks and I tried searching the web to find out what it was. This rock is very smooth, but one side is not as smooth. You can only tell by rubbing your finger over it to see it has a little rough spot. It looks polished to me, but my aunt said she didn't polish it, she found it that way. It's perfectly shaped, with no intentions or nicks or anything. Can anyone tell me what is is? Is this naturally smooth, and naturally shaped or has it been polished? What kind of stone is it?

[brainfogbetty]

Hmmm.. maybe what I have here is a 30 yr old decorative stone. ?

[brainfogbetty]

Wow....over 30 views and not a single reply.

Nada.

Ok, then thanks.

[geodepat]

I don't know what it is but it looks like a fossilized mushroom cap.

[arappaho]

Better late than never, betty.
I'd have to venture the guess that you have already said what it is.
A very pretty and symmetrically water worn rock. I pick them up all
the time and use them in washed areas of my walkway. It is
probably mostly some kindof quartz, which is the reason it has
lasted this long. Quartz and quartzite are pretty durable. And then
if you add another mineral or two to the mix, you have a rock.
I like it too!

Joe

[sophia]

Betty, I have two small marble sized stones that resemble yours. They have white, brown and black, with a look of dendritic agate, (which is still a type of quartz), and were found already smooth. I believe you also have an agate river pebble. Hope this helps.