sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
Hardness: 6-7 (Mohs scale); Color: Tan, yellow, and reddish-brown bands (iron oxide staining); Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs scale)
- Color
- Tan, yellow, and reddish-brown bands (iron oxide staining)
- 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, yellow, and reddish-brown bands (iron oxide staining); Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (sand) over millions of years. This specimen shows distinct bedding or banding, likely stained by iron oxides (hematite/limonite) during diagenesis.
Uses & applications
Used in building construction, paving, grindstones, and as a reservoir rock for oil and gas. In landscaping, it is used for decorative garden paths and rock walls.
Geological facts
Sandstone makes up about 10-20% of the Earth's sedimentary rocks. The famous 'Wave' formation in Arizona is a classic example of cross-bedded sandstone.
Field identification & locations
Identify in the field by its gritty, abrasive texture (like sandpaper) and visible layers. Commonly found in riverbeds, deserts, and coastal areas. Collectors look for unique banding patterns like 'picture sandstone'.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary