metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, white to gray color, vitreous to greasy luster, non-foliated crystal structure, specific gravity around 2.65.
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Physical properties
Hardness of 7 on Mohs scale, white to gray color, vitreous to greasy luster, non-foliated crystal structure, specific gravity around 2.65.
Formation & geological history
Formed through the metamorphism of quartz sandstone under high heat and pressure, typically occurring in mountain-building belts.
Uses & applications
Used in construction, railroad ballast, decorative aggregates, and occasionally manufactured into countertops.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified by its hardness which can scratch glass, lack of reaction to acid, and sugary texture on fractured surfaces.
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