sedimentary
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
Hardness: 6-7 (Mohs scale); Color: Tan, brown, and cream with distinct banding; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific gravity: approx. 2.0-2.6
- Hardness
- 6-7 (Mohs scale)
- Color
- Tan, brown, and cream with distinct banding
- Luster
- Dull/Earthy
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs scale); Color: Tan, brown, and cream with distinct banding; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific gravity: approx. 2.0-2.6
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments of sand size over millions of years, often in ancient riverbeds or deserts. The banding comes from rhythmic shifts in mineral deposition.
Uses & applications
Used primarily for decorative purposes, river rock landscaping, lapidary art (cabochons), and historically as a construction material.
Geological facts
The distinct banding is often caused by 'Liesegang rings', which are secondary precipitates of iron oxides that produce the 'landscape' or 'picture' appearance. These river-worn specimens are often called 'Zen stones'.
Field identification & locations
Identify by its gritty texture and visible stratigraphy or layering. Commonly found in riverbeds, canyons, and sedimentary basins. Look for the parallel lines indicating sedimentary bedding.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary