metamorphic
Quartzite
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to gray or pinkish color, vitreous to greasy luster, non-foliated massive crystal structure, specific gravity around 2.65.
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, white to gray or pinkish color, vitreous to greasy luster, non-foliated massive crystal structure, specific gravity around 2.65.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and tectonic pressure, typically during mountain-building events over millions of years.
Uses & applications
Used widely in construction, dimension stone, railroad ballast, and decorative landscaping due to its extreme durability and weather resistance.
Geological facts
Quartzite is exceptionally hard and weather-resistant, often forming prominent mountain ridges because it erodes much slower than surrounding rocks.
Field identification & locations
Identify in the field by its sugary texture, inability to be scratched by a steel knife, and failure to effervesce with hydrochloric acid. Found globally in ancient mountain belts.
More like this
