[throwanem]

You imply microorganisms capable of digesting glass, stone, and sand, via a hydrofluoric-acid-concentrating biochemistry that I suspect is not even remotely possible in Earth's atmosphere, which is something of a relief because if it did happen, it would almost certainly end all other life on Earth within a span of years to decades.

[johnisgood]

I do not imply their existence. My question is, can they exist or is it completely impossible, even theoretically?

[throwanem]

Nothing is impossible in theory.