sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primarily)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, beige, light brown; Luster: Dull to earthy; Crystal structure: Granular/fragmental; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, beige, light brown
Luster: Dull to earthy

Identified June 20, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, light brown; Luster: Dull to earthy; Crystal structure: Granular/fragmental; Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains, typically quartz. This specimen shows significant rounding, suggesting it was transported and eroded by water in a riverbed or coastal environment.

Uses & applications

Commonly used in construction for road base, concrete aggregate, and as a dimension stone for landscaping; occasionally used for making sharpening stones.

Geological facts

Sandstone accounts for approximately 25 percent of the sedimentary rocks in the Earth's crust. Its porous nature makes it a vital reservoir for groundwater and petroleum.

Field identification & locations

Identify by a 'sandpaper' feel and visible grains. Often found in riverbeds, canyons, and desert regions worldwide. Collectors look for unique weathering patterns or fossils within the matrix.