What kind of rock have I found?

[Cramberamber5]

TL;DR Summary

I found a round smooth like rock with orange and black stripes and it's magnetic

I found a round smooth like rock with orange and black stripes and it's magnetic

Reference: https://www.physicsforums.com/forums/earth-sciences.84/post-thread...i don't know how to post picture

 

[Cramberamber5]

I have a round smooth like rock with orange and black/gray stripes and it's magnetic,can anyone help me identify what it is or might be? please and thank you.

 

[Baluncore]

Either drag and drop the image onto your edit window,
or click attach files button on the left, below the edit window.

 

[Delta2]

I think it must be a composite material, the orange stripes being some rock material and the grey stripes being some chemical compound of magnesium.

 

[Baluncore]

My guess is a quartzite.
The rock was laid down as beds of pure sand during floods, alternating with mud-contaminated sand during quiet periods. Then it was cooked for millions of years, under great pressure, and so metamorphosed into a banded quartzite. That rock was then washed down a river, and/or spent time on a beach, until it became a well-rounded stone.

It would probably look better if it was wet, or was given a clear coat of lacquer.
Where on Earth did you find it, and in what setting?
Are the light and dark bits magnetic? Does it deflect a compass?

 

[Baluncore]

There are several possibilities.
https://en.wikipedia.org/wiki/Rhythmite