Can I not send a photo, be more easier,

Rocks are old... very old.

Yes you can post a picture here, but do so under Geology, and say exactly where you found it.

See the tool bar at the top of each box, with the usual icons? The third from the right is the picture icon.
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Posting a picture of a rock, even knowing where it was found, is going to be difficult to judge if it cant be seen with the naked eye.