metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray with various staining colors, vitreous to greasy luster, non-foliated crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray with various staining colors, vitreous to greasy luster, non-foliated crystal structure.
Formation & geological history
Formed through the metamorphism of quartz sandstone under high heat and pressure, commonly occurring during mountain-building events.
Uses & applications
Used in construction, railroad ballast, manufacturing of silica bricks, and occasionally as decorative stone or countertops.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent ridges and mountain peaks because it resists erosion better than surrounding rocks.
Field identification & locations
Identified by its inability to be scratched by steel and lack of effervescence with acid; found worldwide in ancient mountain belts.
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