Posted on Rock Forum and someone suggested that I post here and ask. I was told it is volcanic pumice but does not float in water. Anybody?
Thanks for looking!
The fact that there is absolutely no structure within the 'bubbles' argues against it being a coral. In fact, the lack of any structure other than the bubbles leads me to believe it is not biological in origin. Perhaps it is scoria or slag.
I may not know if it's natural or manmade but I do know I have something that looks just like it that I bought at the store a couple of years ago. It's sold as volcanic pumice for exfoliation.
I may not know if it's natural or manmade but I do know I have something that looks just like it that I bought at the store a couple of years ago. It's sold as volcanic pumice for exfoliation.