Quartzite walls

Are there any quartzite grade V or VI routes? I can't seem to find any

Thanks!

The Brazos Cliffs, near Chama NM, may have some Vs. 

I think there are loads of VIs on Mount Geike and other peaks in the Ramparts of the Rockies.  Check AAJ.

I seem to remember some big quartzite cliffs in south Africa, can't remember the names 

The Tepuis in South America are quartzite - and supposedly mostly very good quality rock. Not sure how they measure in terms of Grade V vs VI.