metamorphic
Quartzite
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster, and a non-foliated massive structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster, and a non-foliated massive structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically during mountain-building events.
Uses & applications
Used extensively in construction as crushed stone for road bases, in railway ballast, and as a decorative building stone or countertop material.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges because it erodes much slower than surrounding rocks.
Field identification & locations
Identified easily by its inability to be scratched by a steel knife and its lack of effervescence when tested with hydrochloric acid; found globally in ancient orogenic belts.
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