metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white, gray, or reddish-brown due to iron oxide staining.
Identified More metamorphic →
Explore Quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white, gray, or reddish-brown due to iron oxide staining.
Formation & geological history
Formed under high heat and pressure from quartz-rich sandstone during regional or contact metamorphism, often billions of years old.
Uses & applications
Used in construction, railroad ballast, manufacturing of silica bricks, and occasionally as decorative stone or in lapidary arts.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, which is why ridges formed of quartzite often survive as prominent hills.
Field identification & locations
Identify by its non-reactive nature to acid and the inability of metal to scratch it; commonly found in mountainous or ancient craton regions.
More like this
