sedimentary

Sandstone (Iron-stained)

Arenite (primarily Quartz, SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, brown, and yellow-orange due to limonite/hematite staining; Luster: Dull/Earthy; Crystal structure: Clastic (granular); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs)
Luster: Dull/Earthy

Identified June 14, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Tan, brown, and yellow-orange due to limonite/hematite staining; Luster: Dull/Earthy; Crystal structure: Clastic (granular); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years in environments such as deserts, river beds, or beaches.

Uses & applications

Commonly used in construction for building stone, paving, and decorative garden features. High-quality quartz sandstone is used for glass manufacturing.

Geological facts

Sandstone accounts for roughly 20 to 25 percent of all sedimentary rocks on Earth. The spectacular arches in Arches National Park are primarily composed of sandstone.

Field identification & locations

Identify in the field by its gritty, sandpaper-like feel and visible layering (bedding). It is found globally in sedimentary basins. Collectors often look for unique erosion patterns or fossil inclusions.