metamorphic
Tumbled banded stone, likely gneiss or quartzite
Likely quartz-feldspar gneiss; exact identification is uncertain from the image
AI-generated identification · may be incorrectSmooth, rounded, cream-colored stone with gray parallel bands. Likely dominated by quartz and feldspar; hardness about 6–7 Mohs, with a nonmetallic luster and no obvious cleavage.
Identified More metamorphic →
Explore Tumbled banded stone, likely gneiss or quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Smooth, rounded, cream-colored stone with gray parallel bands. Likely dominated by quartz and feldspar; hardness about 6–7 Mohs, with a nonmetallic luster and no obvious cleavage.
Formation & geological history
If gneiss or quartzite, it formed through metamorphism of older rock under heat and pressure; its age and original source cannot be determined from the photo. The rounded surface indicates natural water wear or tumbling.
Uses & applications
Commonly used for decorative displays, landscaping, and craft or jewelry projects; this specimen appears to be a modest decorative pebble.
Geological facts
The visible banding may reflect mineral layering or deformation, but a photograph cannot reliably distinguish gneiss from quartzite or other banded stones.
Field identification & locations
Look for the contrasting bands and test hardness on an inconspicuous spot; quartz-rich stone should scratch glass. Banded pebbles occur in river and beach gravels and are widely available as landscaping material.
More like this
