metamorphic
Quartzite
Metamorphic Quartz
AI-generated identification · may be incorrectMohs hardness of 7, vitreous luster, white to gray color, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Mohs hardness of 7, vitreous luster, white to gray color, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed through the metamorphism of quartz sandstone under high heat and pressure, typically during mountain-building events.
Uses & applications
Used in construction, as crushed stone for roads, dimension stone, and in the manufacture of glass and refractory bricks.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent ridges and peaks in mountain ranges.
Field identification & locations
Identify by its hardness (scratches glass), sugary texture on fractured surfaces, and lack of reaction to hydrochloric acid. Found globally.
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