metamorphic
Quartzite
Metamorphic Quartz Arenite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, colors range from white to gray and pink, vitreous to greasy luster, non-foliated crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, colors range from white to gray and pink, vitreous to greasy luster, non-foliated crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically in mountain-building belts.
Uses & applications
Used in construction, railroad ballast, manufacturing of silica brick, and as a decorative stone.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify by its hardness (scratches glass), sugary texture on fractured surfaces, and lack of reaction to acid. Found worldwide.
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