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Any Professionals Ideas


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That is nice looking chert, full of color some even look like opal, that's what i see.

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Looks like slag and/or smelting glass to me. Maybe a piece of clinker brick in there too. IIRC, the green comes from fluxes that get oversaturated with Fe, reds were often Pb. Unevaporated zinc films gave opalescence. It's been a year since I was playing around with smelting, can't remember exactly. 

One photo (the one that appears copied from a webpage) is the only real looking rock to me, and it's some kind of sage green quartzite or grainy chert.

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