metamorphic
Quartz-rich weathered rock, possibly quartzite
Quartzite (mostly SiO₂); exact identification is uncertain from the image
AI-generated identification · may be incorrectTan to orange-brown, granular and massive, with a dull to sugary vitreous luster; quartz hardness is about Mohs 7, with no obvious cleavage. Iron-oxide staining likely produces the warm coloration; specific gravity is roughly 2.6–2.7.
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Physical properties
Tan to orange-brown, granular and massive, with a dull to sugary vitreous luster; quartz hardness is about Mohs 7, with no obvious cleavage. Iron-oxide staining likely produces the warm coloration; specific gravity is roughly 2.6–2.7.
Formation & geological history
Quartzite forms when quartz-rich sandstone is recrystallized under heat and pressure, commonly during regional metamorphism. Its age depends on the source terrain and cannot be determined visually.
Uses & applications
Common quartzite is used as crushed stone, aggregate, riprap, flagstone, and building material; attractive pieces may be collected but are generally low-value.
Geological facts
The specimen’s irregular, weathered surface and pale quartz-like patches are consistent with quartzite or strongly silicified sandstone, though it could also be a quartz-rich igneous or sedimentary fragment.
Field identification & locations
Look for a sandpapery or sugary quartz texture, lack of visible pores, and ability to scratch glass; quartzite typically breaks across grains rather than around them. Common worldwide, especially in metamorphic mountain belts.
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