Andesite is quartz based, but it also has a 6% amount of CaO (calcium oxide) which can be treated with oxalic acid, as I showed you before.
But then only the surface will be changed. altered, and that is that shine, that 'vitrification' you keep talking about.
Which rules out the possibility that the Andesite blocks were 'poured'. The geopolymer theory even falls down when considering the pyramids because the GP contains a significant amount of red granite.
Another theory is needed to account for the high precision work in the Kings Chamber for example.