sedimentary

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, beige with reddish-orange patches; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs)
Color: Tan, beige with reddish-orange patches
Luster: Dull/Earthy

Identified June 26, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Tan, beige with reddish-orange patches; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formation through the accumulation and cementation of mineral particles (sand-sized grains) such as quartz and feldspar, often in riverbeds, deserts, or coastal environments. Often dates from various eras depending on the local strata.

Uses & applications

Used widely in construction as a building material, in the glass industry (if high silica), and for decorative architectural features.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. The red patches often indicate the presence of iron oxide (hematite).

Field identification & locations

Identify by its gritty, sand-like texture when touched. Found globally in basins and mountainous regions. Collectors look for unique banding or fossil inclusions.