sedimentary
Weathered stone, likely sandstone or altered volcanic rock
Indeterminate; possibly quartz-rich sandstone or weathered tuff
AI-generated identification · may be incorrectPale tan, fine-grained, dull to slightly earthy luster, with dark mineral spots and rounded edges from weathering or abrasion. Hardness is visually estimated around Mohs 5–7; cleavage and crystal structure are not resolvable from the image.
Identified More sedimentary →
Explore Weathered stone, likely sandstone or altered volcanic rock in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Pale tan, fine-grained, dull to slightly earthy luster, with dark mineral spots and rounded edges from weathering or abrasion. Hardness is visually estimated around Mohs 5–7; cleavage and crystal structure are not resolvable from the image.
Formation & geological history
Likely formed from lithified sediment or compacted volcanic ash, then chemically weathered and naturally or artificially rounded. Its geological age cannot be determined photographically.
Uses & applications
Unlikely to have significant industrial or jewelry value; suitable mainly as a teaching, landscaping, or casual collecting specimen if confirmed as natural stone.
Geological facts
The yellow-brown color may result from iron-oxide staining, while the dark flecks could be mafic minerals, lithic fragments, or surface inclusions.
Field identification & locations
A hand-lens inspection, streak test, acid test, and hardness testing would help distinguish sandstone from volcanic rock; a fresh broken surface and locality information are especially valuable. Common analogues occur worldwide in weathered outcrops, streambeds, and construction aggregate.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary