metamorphic
Small polished pebble, possibly quartzite
Unidentified quartz-rich rock; quartzite is a tentative visual identification
AI-generated identification · may be incorrectRounded, polished, pale tan-pink surface with a glossy sheen; grain and crystal structure are not resolvable from the image. If quartzite, it is mostly quartz (Mohs 7), with no prominent cleavage and specific gravity near 2.65.
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Physical properties
Rounded, polished, pale tan-pink surface with a glossy sheen; grain and crystal structure are not resolvable from the image. If quartzite, it is mostly quartz (Mohs 7), with no prominent cleavage and specific gravity near 2.65.
Formation & geological history
Could be a naturally water-worn pebble or a tumbled specimen. Quartzite forms when quartz-rich sandstone is recrystallized by heat and pressure; its age and origin cannot be determined from appearance alone.
Uses & applications
Small polished stones are used for decoration, crafts, and collecting; quartzite also serves as building and paving stone.
Geological facts
The visible sheen may be from polishing or a coating, so the image alone cannot confirm the rock type.
Field identification & locations
Inspect a fresh, uncoated surface for interlocking quartz grains; a hardness or acid test should be done only if appropriate. Quartzite occurs worldwide, especially in metamorphic belts.
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