metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray in color, with a vitreous to greasy luster and a non-foliated, granular crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray in color, with a vitreous to greasy luster and a non-foliated, granular crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure over millions of years.
Uses & applications
Used widely in construction, as crushed stone for roads, for decorative landscaping, and occasionally in countertops.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges because it weathers slower than surrounding rocks.
Field identification & locations
Identify by its ability to scratch glass and the fact that it breaks across quartz grains rather than around them; found globally in mountainous or ancient cratonic regions.
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