Quartzite

"A metamorphic quartz based stone formed in exceedingly hard layers. In some deposits, intrusion of minerals during the formation process create unusual coloration"

Quartzite is a hard metamorphic rock which was originally sandstone. When sandstone is metamorphosed to quartzite the quartz grains re-crystallize, changing the original texture and structure of the sandstone. Quartzite is used today as a decorative stone, which has proven to be resilient to any wear in most applications.