Quartzite is a non-foliated metamorphic rock. - sorry if I'm wrong.
A quatzite and a marble
A quatzite and a marble
This hard glass-like stone, quartzite, makes fine cutting edges, and spear points.
Quartzite is a metamorphic rock, that, in most cases, is 5,000 years old. Even thogh this rock is called Quartzite, it is not made from quartz. Instead, Quartzite is made from a form of limestone.