sedimentary

Sandstone (Quartzose / Feldspathic Sandstone)

Arenite (SiO2 principal matrix)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale (due to quartz grains); Color: reddish-pink, tan, to pale grey-brown; Luster: earthy, dull, granitic feel; Texture: medium to coarse sandy grain with visible quartz/feldspar inclusions; Cleavage: none.

Hardness: 6-7 on Mohs scale (due to quartz grains)
Color: reddish-pink, tan, to pale grey-brown
Luster: earthy, dull, granitic feel

Identified July 24, 2026More sedimentary →

Explore Sandstone (Quartzose / Feldspathic Sandstone) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in ancient desert, riverbed, or coastal beach environments. Over millions of years, silica, iron oxide, or calcium carbonate cements the grains together.

Uses & applications

Widely used as a construction material, flagstone, paving stone, decorative landscaping rock, and historically for building monuments and sculptures. Pure quartz sandstone is also used as a source of silica in glassmaking.

Geological facts

Sandstone often records ancient environmental clues like ripple marks, cross-bedding, and fossilized footprints. The distinct reddish or pinkish coloration present in specimens like this is caused by small traces of hematite or iron oxide surrounding the sand grains.

Field identification & locations

Identified in the field by its characteristic rough, sandpaper-like texture and grainy aggregate structure. It is extremely common globally, especially in plateau regions, canyons, and sedimentary basins worldwide.