metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically tan, gray, or white with a vitreous to greasy luster, massive crystal structure, and 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 tan, gray, or white with a vitreous to greasy luster, massive crystal structure, and conchoidal fracture.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and tectonic pressure, typically over hundreds of millions of years.
Uses & applications
Used in construction, road surfacing, railway ballast, dimension stone, and occasionally for decorative landscaping.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it erodes much slower than surrounding rocks.
Field identification & locations
Identify it by its inability to be scratched by a knife, sugary texture on freshly broken surfaces, and lack of reaction to acid.
More like this
