igneous
Weathered quartz-rich pebble
Likely quartzite or quartz-rich granite fragment; exact identification is uncertain from the blurred image
AI-generated identification · may be incorrectTan, pale gray, granular specimen with dull to weakly vitreous luster and no obvious cleavage; quartz hardness is about 7 Mohs, while quartzite is typically 6.5–7. Specific gravity is roughly 2.6–2.7.
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Physical properties
Tan, pale gray, granular specimen with dull to weakly vitreous luster and no obvious cleavage; quartz hardness is about 7 Mohs, while quartzite is typically 6.5–7. Specific gravity is roughly 2.6–2.7.
Formation & geological history
Likely a naturally weathered, rounded fragment produced by erosion of quartzite or felsic igneous rock; its geological age cannot be determined visually. Such material commonly accumulates in stream gravels, beaches, and glacial deposits.
Uses & applications
Common pieces are used as landscaping or aggregate material; attractive quartzite may be collected or used as decorative stone, but this fragment appears to have little commercial value.
Geological facts
The granular texture and pale tan color are consistent with quartz-rich material, though the image lacks sufficient detail to distinguish quartzite from granite, sandstone, or weathered feldspar-rich rock.
Field identification & locations
Look for visible interlocking quartz grains, lack of layering, and the ability to scratch glass; acid testing is usually negative. Common worldwide, especially in river gravels and exposed quartzite or granite terrains.
