metamorphic
Weathered, iron-stained quartzite pebble
Quartzite, composed mainly of quartz (SiO₂)
AI-generated identification · may be incorrectPale gray-beige with rusty brown staining and a rough, fractured surface; quartz is Mohs 7, vitreous to dull, and has no cleavage. The image does not show enough detail to confirm the identification or determine crystal texture precisely.
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Physical properties
Pale gray-beige with rusty brown staining and a rough, fractured surface; quartz is Mohs 7, vitreous to dull, and has no cleavage. The image does not show enough detail to confirm the identification or determine crystal texture precisely.
Formation & geological history
Quartz-rich sandstone transformed by heat and pressure into interlocking quartz grains; this process occurs in many mountain-building regions, and the rock’s age cannot be determined from the image.
Uses & applications
Quartzite is used as crushed stone, building and decorative stone, and sometimes as a durable landscaping pebble; this small specimen is mainly suitable for collecting.
Geological facts
Quartzite is typically harder than glass and breaks across grains rather than around them.
Field identification & locations
A quartzite pebble commonly has a hard, compact surface and may show sparkly interlocking grains; similar pebbles occur in river gravels and glacial deposits worldwide. A close-up or scratch test would help distinguish it from other pale rocks.
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