metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, vitreous luster, white to gray or greenish color, massive crystal structure with interlocking quartz grains.
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Physical properties
Hardness of 7 on Mohs scale, vitreous luster, white to gray or greenish color, massive crystal structure with interlocking quartz grains.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under high heat and pressure, typically over hundreds of millions of years.
Uses & applications
Used extensively in construction, as crushed stone for roads, dimension stone, and for manufacturing glass or ferrosilicon.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify in the field by its sugary texture, inability to be scratched by a steel knife, and lack of fizz with acid. Found globally in ancient mountain belts.
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