No, it's not. Your test of falsifiability is not credible.
Why, do you seriously believe that if we found an earthly organism which had its genetics based on silicon oxides, that this organism is descended from a common ancestor as all the other life on earth? I would contend that an earthly organism with a silicon oxide based genetic material would be conclusive proof that evolution is false. I am not contending that such an organism will ever be found; that is not what is necessary for a theory to be falsifiable. It is only necessary that such a hypothetical observation exist. (BTW, there are many other potentially falsifying observations for evolution. This is not the only one.) What is the observation that would make you give up ID?