- Jul 4, 2022
Well I've ran in to a different looking type of rock today that looks like lava rock. It's very dark green and it's filled with a black surty mineral. I melted it down and it only collects on the outside of a poured bar. I'm sure I'll figure it out but what do you think? I used only borax to get it thin enough to pour. It tests green with the silver test acid .