sedimentary

Sandstone

Arenite (SiO2 based)

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Texture: Gritty like sandpaper.

Hardness: 6-7 on Mohs scale
Color: Tan, beige, or light brown
Luster: Dull/Earthy

Identified June 6, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Texture: Gritty like sandpaper.

Formation & geological history

Formed from the accumulation and cementation of mineral particles or rock fragments (detritus), usually quartz or feldspar, over millions of years in deserts, river beds, or ocean floors.

Uses & applications

Widely used as a construction material (dimension stone), in glass manufacturing (if high silica content), and as grindstones for sharpening metal.

Geological facts

Sandstone formations often serve as excellent aquifers or petroleum reservoirs due to their high porosity and permeability. Famous examples include the Antelope Canyon in Arizona.

Field identification & locations

Identify by its gritty texture and visible sand grains. Commonly found in sedimentary basins and arid regions. Collectors look for unique banding patterns like 'Wonderstone'.