metamorphic
Light-colored quartz-rich rock (possibly quartzite)
Quartzite, composed predominantly of quartz (SiO₂)
AI-generated identification · may be incorrectThe pale, rough, granular specimen contrasts with darker surrounding stones. Quartz has Mohs hardness 7, vitreous to dull luster, and a trigonal crystal structure; the image is insufficient to confirm the rock’s identity or texture.
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Physical properties
The pale, rough, granular specimen contrasts with darker surrounding stones. Quartz has Mohs hardness 7, vitreous to dull luster, and a trigonal crystal structure; the image is insufficient to confirm the rock’s identity or texture.
Formation & geological history
Quartzite forms when quartz-rich sandstone is recrystallized by heat and pressure during metamorphism. Its age and geological setting cannot be determined from the image.
Uses & applications
Quartzite is used as building and decorative stone, aggregate, and sometimes as a source of silica; this small, unworked piece has little practical or jewelry value.
Geological facts
A key field clue for quartzite is that it fractures through interlocking quartz grains rather than around them, unlike many sandstones.
Field identification & locations
The specimen could also be another pale, weathered rock; reliable identification requires examining a fresh surface and testing hardness. Quartzite occurs in metamorphic terrains worldwide.
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