Question: what are the physical properties of quartzite?
Answer: Quartzite is a nonfoliated metamorphic rock composed almost absolutely of quartz. ...  Texture: Granular. Grain size: Medium grained; can see interlocking quartz crystals with the naked eye. Hardness: Hard. Colour: Pure quartzite is white but quartzite exists in a wide variety of colours. Mineralogy: Quartz.