Quartzite begins as metamorphic sandstone that ... of sand to fuse together and form a dense rock. While quartzite is made almost entirely of mineral quartz, additional minerals can result in ...

Heat and/or pressure will cause the elements in the original rock to react and re-form. Metamorphic rocks are highly resistant to erosion and are often used in building materials.

Quartz is made of the chemical elements ... There are three main types of rock — igneous, sedimentary and metamorphic — with varying mineral mixes depending on where and how the rock came ...

Quartzite begins as metamorphic sandstone that ... of sand to fuse together and form a dense rock. While quartzite is made almost entirely of mineral quartz, additional minerals can result in ...