sedimentary

Sandstone (Quartz-rich)

Arenite

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or earthy yellowish-brown; Luster: Dull or earthy; Crystal structure: Clastic (grains); Cleavage: None; Specific gravity: 2.2-2.8

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

Identified June 2, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or earthy yellowish-brown; Luster: Dull or earthy; Crystal structure: Clastic (grains); Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and lithification of sand-sized mineral grains or rock fragments, typically through pressure and mineral cements like silica or calcium carbonate in river, lake, or ocean environments over millions of years.

Uses & applications

Commonly used in construction as a building material, for paving, decorative landscaping, and as a component in glass manufacturing.

Geological facts

Sandstone makes up about 10-20% of the Earth's sedimentary rocks. Famous landmarks like Petra in Jordan and the Grand Canyon are primarily composed of various types of sandstone layers.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible layering. It is found globally in arid regions and coastal cliffs. Collectors should look for unique cross-bedding patterns or fossils.