I’ve been trying to learn about rocks and came across this in lists of deadly rocks: https://en.m.wikipedia.org/wiki/Chalcanthite https://en.m.wikipedia.org/wik

I’ve been trying to learn about rocks and came across this in lists of deadly rocks: https://en.m.wikipedia.org/wiki/Chalcanthite https://en.m.wikipedia.org/wiki/Chalcanthite Which is annoying because even rocks are out to get me. It’s chemical formula is CuSO4·5H2O which reminds me of H2SO4 which is sulphuric acid. The article does contain a warning.