The Difference Between Quartzite and Quartz
Quartzite is a nonfloated metamorphic rock composed almost completely of quartz. It forms from sandstone that has been altered by pressure, heat and by the chemical transformation of metamorphism.
The structure of quartzite makes it a tough, durable rock that is found in folded mountains throughout the world.
Typically, the color of quartzite ranges from white to gray unless it is stained by iron or has other impurities that cause it to turn pink, red, purple, yellow, orange, brown, green or blue.
If the quartzite is semitransparent or translucent, the flat flakes of mica reflect light and produce a glittering luster known as aventurescence.
Material that displays this luster is known as aventurine, a material used to produce beads, tumbled stones and other and intricate ornaments. Aventurine can be pink or red when stained by iron minerals. Included dumortierite produces a blue shade. Other inclusions produce white, gray, orange, or yellow aventurine.
Quartz, on the other hand, is an engineered stone, a composite material made of crushed stone that is bound together by an adhesive, (most commonly polymer resin, with some newer versions using cement mix). The two commonly stones used in producing these products are marble and quartz.