It is the second-most-abundant mineral of the continental (*) crust after feldspar, with which it combines to form granite.
The "shocked" form of this mineral is found in the K-T boundary. When the suffix "-ite" is added to the name of this mineral, it names a metamorphic rock that forms from sandstone. This is the only non-feldspar mineral on the QAPF diagram. It is the second-most-abundant mineral of the continental (*) crust after feldspar, with which it combines to form granite. This mineral is a seven on the Mohs scale of hardness. For 10 points, name this mineral made up of tetrahedral silicon dioxide crystals, which comes in "rose" and amethyst varieties.
The "shocked" form of this mineral is found in the K-T boundary.
{quartz}