sedimentary

Sandstone

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or earthy; Luster: Dull or earthy; Crystal structure: Granular; Cleavage: None; Specific Gravity: 2.2-2.8. Feels gritty to the touch like sandpaper.

Hardness: 6-7 on Mohs scale
Color: Tan, brown, or earthy
Luster: Dull or earthy

Identified May 3, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or earthy; Luster: Dull or earthy; Crystal structure: Granular; Cleavage: None; Specific Gravity: 2.2-2.8. Feels gritty to the touch like sandpaper.

Formation & geological history

Formed through the accumulation, compaction, and cementation of sand-sized mineral particles or rock fragments, typically silicate minerals like quartz and feldspar. Usually formed in river beds, beaches, or desert environments.

Uses & applications

Commonly used as a building material, grit for sharpening tools, in glass manufacturing, and as an decorative stone in landscaping. Tiny river-worn pieces like this are often collected for home aquariums or terrariums.

Geological facts

Sandstone is one of the most common types of sedimentary rock and is found in sedimentary basins throughout the world. Famous structures like Petra in Jordan are carved directly into sandstone cliffs.

Field identification & locations

Identify by its gritty texture and visible sand grains. It is extremely common in riverbeds, beaches, and desert regions worldwide. Collectors often look for colorful banding or fossil inclusions.