Volcanic Rock Of Some Sort

[Cariboo5]

Oops...Posted this in the wrong thread...Posted again in the Rock section...

 

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[old digger]

Volcanic rock or eroded limestone. Try and put a drop or two of muritac acid on it and see if it bubbles up. If it does then it may be limestone. I don't think volcanic pumice will react to the acid. ( Be sure to wash the rock and anything else off good with water when you are done.)