I found this rock in my yard.  At first there was one very small shiny brown spot that made me want to check it out.  After scrubbing mostly with bristle brush and water, it got really interesting.  I did also soak it in vinegar and tired of scrubbing, I did take a light setting pressure washer to it, just a little bit.  So far most of the brown stone crumbles but the green does not...  The edges that are flat were like that when I found it.  Any input, thoughts or ideas would be much appreciated. 
Thank You

Well they say there's one in every crowd but I think we have a crowd of ones around here!

Thanks, Laurie, Good to hear from you!

Hello, Fireballtwin, and Welcome!
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