metamorphic
Quartzite
Metamorphic Quartz Arenite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pinkish-brown with a vitreous to greasy luster. Exhibits a non-foliated, interlocking crystalline structure with conchoidal fracture.
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, typically white, gray, or pinkish-brown with a vitreous to greasy luster. Exhibits a non-foliated, interlocking crystalline structure with conchoidal fracture.
Formation & geological history
Formed when quartz-rich sandstone is subjected to intense heat and pressure deep within the Earth's crust, typically during mountain-building events over millions of years.
Uses & applications
Used widely in construction as crushed stone for roadbeds, railway ballast, and decorative building facings, as well as in the manufacturing of silica bricks.
Geological facts
Unlike sandstone, quartzite breaks across the quartz grains rather than around them, making it exceptionally durable and resistant to weathering.
Field identification & locations
Can be identified in the field by its inability to be scratched by steel and its refusal to fizz with hydrochloric acid. Found globally in major mountain ranges.
More like this
