sedimentary

Sandstone

Arenite (primarily Quartz Sandstone)

Hardness: 6-7 (Mohs scale); Color: Brown, tan, buff, and grey; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None (breaks across grains); Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Brown, tan, buff, and grey
Luster: Dull/Earthy

Identified June 22, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Brown, tan, buff, and grey; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None (breaks across grains); Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (sand) over millions of years. These specimens likely formed in ancient riverbeds or coastal environments before being lithified into stone.

Uses & applications

Widely used in construction as a building material, decorative stone veneer, paving, and landscaping. High-purity sandstones are used for glassmaking.

Geological facts

Sandstone is one of the most common sedimentary rocks in the Earth's crust. It is a major reservoir for groundwater and petroleum because of its porosity and permeability.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. It is commonly found in desert regions, canyons, and sedimentary basins worldwide. In this context, it is used as a 'stacked stone' architectural veneer.