Joseph 11 Posted September 18, 2022 Share Posted September 18, 2022 What is this - many different pieces? Link to comment Share on other sites More sharing options...
Hardtimehermit Posted September 18, 2022 Share Posted September 18, 2022 That is nice looking chert, full of color some even look like opal, that's what i see. 2 Link to comment Share on other sites More sharing options...
jasong Posted September 18, 2022 Share Posted September 18, 2022 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. 6 Link to comment Share on other sites More sharing options...
Flydog Posted September 19, 2022 Share Posted September 19, 2022 Looks like Obsidian to me Link to comment Share on other sites More sharing options...
Geologyhound Posted April 10, 2023 Share Posted April 10, 2023 Were these all found in the same location? I concur most of them look like slag or clinker. The green banded one without lots of air bubbles looks like some jasper I have in the back shed. Link to comment Share on other sites More sharing options...
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