igneous
Weathered quartz-rich rock, possibly granite or quartzite
Indeterminate; likely quartz–feldspar aggregate, potentially altered granite
AI-generated identification · may be incorrectPink-brown, granular and irregular, with pale translucent grains and a darker weathered edge; likely Mohs 6–7, vitreous to dull luster, and no obvious cleavage. The photograph is insufficient to determine exact mineralogy or specific gravity.
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Physical properties
Pink-brown, granular and irregular, with pale translucent grains and a darker weathered edge; likely Mohs 6–7, vitreous to dull luster, and no obvious cleavage. The photograph is insufficient to determine exact mineralogy or specific gravity.
Formation & geological history
Probably a naturally weathered fragment of felsic igneous rock, formed by crystallization of silica-rich magma millions to billions of years ago; metamorphic quartzite is an alternative.
Uses & applications
Common granite-like material is used for construction, aggregate, and decorative stone; this small specimen has mainly educational or modest collecting value.
Geological facts
Pink coloration commonly reflects potassium feldspar, while translucent gray grains are quartz; brown surfaces may be iron-oxide weathering.
Field identification & locations
Look for glassy quartz, pink feldspar, and possibly dark mica; a steel file or knife should not easily scratch quartz. Common in continental crust and glacial or stream gravels.
