Sandstone

Physical Properties

Hardness: 6-7 on Mohs scale; Color: olive drab to brownish-tan; Luster: dull/earthy; Texture: granular, sandpaper-like; Cleavage: none.

Formation & Geological History

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in riverbeds, lakes, or oceans over millions of years.

Uses & Applications

Primarily used as a building material, in the manufacturing of glass, and as a common specimen for educational geological collections.

Geological Facts

Sandstone accounts for about 10-25% of the sedimentary rocks on Earth. The grains are typically composed of quartz or feldspar because these are the most resistant minerals to weathering.

Field Identification & Locations

Identify in the field by its gritty texture and visible sand grains. This specific specimen has been chemically or physically weathered into a unique elongated 'cigar' shape.

Identified on: 5/3/2026

Mode: Standard