metamorphic
Likely pink quartzite
Quartzite, composed predominantly of quartz (SiO₂); exact identification is uncertain from the image alone.
AI-generated identification · may be incorrectPinkish-brown, dull to slightly glassy surface with a granular texture; quartz has Mohs hardness 7 and trigonal crystal structure, but individual grains are not distinct here. The specimen appears massive, without obvious cleavage.
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Physical properties
Pinkish-brown, dull to slightly glassy surface with a granular texture; quartz has Mohs hardness 7 and trigonal crystal structure, but individual grains are not distinct here. The specimen appears massive, without obvious cleavage.
Formation & geological history
Quartzite forms when quartz-rich sandstone is recrystallized by heat and pressure during metamorphism. Its age and formation location cannot be determined from the photograph.
Uses & applications
Quartzite is used as crushed stone, building and paving material, and decorative stone; attractive pieces may be collected or fashioned into ornaments.
Geological facts
Quartz grains in well-cemented quartzite interlock, making it exceptionally resistant to abrasion and weathering.
Field identification & locations
A likely quartzite; test cautiously for hardness—quartz-rich material can scratch glass—and look for interlocking grains and no visible layering. Quartzite occurs in metamorphic mountain belts worldwide.
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