metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pink with a vitreous to greasy luster. It features a non-foliated granular crystal structure and lacks cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or pink with a vitreous to greasy luster. It features a non-foliated granular crystal structure and lacks cleavage.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and tectonic pressure, often dating back billions of years.
Uses & applications
Used widely in construction, decorative aggregates, heavy-duty countertops, and as a raw material for industrial silica.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming the highest mountain ridges because it erodes slower than surrounding rocks.
Field identification & locations
Identify by its hardness (scratches glass easily), lack of acid reaction, and sugary, interlocking quartz grain texture. Found worldwide in ancient mountain belts.
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