metamorphic
Quartzite
Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Colors can range from white to gray, pink, or red depending on impurities. It has a vitreous luster and a granular, non-foliated structure. No cleavage.
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Physical properties
Hardness of 7 on the Mohs scale. Colors can range from white to gray, pink, or red depending on impurities. It has a vitreous luster and a granular, non-foliated structure. No cleavage.
Formation & geological history
Formed from quartz sandstone through heat and pressure (metamorphism) typically associated with tectonic compression.
Uses & applications
Used in construction, as a decorative stone, for countertops, and historically for making stone tools.
Geological facts
Because it is composed almost entirely of quartz, quartzite is highly resistant to chemical weathering.
Field identification & locations
Can be identified by its sugary texture and hardness (it will scratch glass). Commonly found in areas of past tectonic activity.
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