I am not sure but I think it is copper that gives the rocks the unusual color. So pretty and I can't say I blame you for taking a few small ones home:)
I am not sure but I think it is copper that gives the rocks the unusual color. So pretty and I can't say I blame you for taking a few small ones home:)
I suspect you are right. It was more of a coating on all different types of rocks. I placed one outdoors and after a few years it is no longer green. The ones that are protected, sitting on my bookshelf, are still green.
I think you are on to something! ;)