Sandstone (Water-worn)

Physical Properties

Hardness: 6-7 Mohs; Color: Tan, beige, or grey with visible bedding planes; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None (distinct bedding instead); Specific gravity: 2.2-2.8

Formation & Geological History

Formed through the accumulation and cementation of mineral particles or rock fragments (detritus). This specific specimen shows river or beach wear, rounding the edges through aqueous erosion. Usually formed in fluvial or marine environments.

Uses & Applications

Primary uses include building stone and paving materials. Fine-grained samples are sometimes used for whetstones or grindstones.

Geological Facts

Sandstone is one of the most common sedimentary rocks on Earth. This specific sample displays 'bedding'—distinct layers that were originally horizontal deposits of sediment.

Field Identification & Locations

Identify by its gritty texture (feels like sandpaper) and visible layering (stratification). Found globally in riverbanks, deserts, and coastal cliffs. Collectors should look for unique weathering patterns.

Identified on: 4/14/2026

Mode: Standard