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enter image description here. Can use some help to identify the rock I found. It's black on the outside and white or gray on the inside.

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put on hold as off-topic by hichris123 2 days ago

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – hichris123
If this question can be reworded to fit the rules in the help center, please edit the question.

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I have found stones like this before from the Owyhee Desert in southwestern Idaho. Your rock appears to be quartzite with a black coating similar to desert varnish which typically consists of iron and manganese oxides.

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