sedimentary

Sandstone (Quartzose)

Arenite (SiO2 based)

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or gray; Luster: Dull/Earthy; Crystal Structure: Clastic (sand grains); Cleavage: None (granular); Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Tan, beige, or gray
Luster: Dull/Earthy

Identified June 8, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or gray; Luster: Dull/Earthy; Crystal Structure: Clastic (sand grains); Cleavage: None (granular); Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains, usually quartz. This specific specimen appears to be a water-worn river stone or beach cobble, shaped by erosion over thousands of years.

Uses & applications

Commonly used in construction as building stone, as an abrasive in industry, or for its ornamental value in landscaping and rock collections.

Geological facts

Sandstone is one of the most common sedimentary rocks on Earth and often contains fossils or cross-bedding structures that reveal ancient environmental conditions such as deserts or river deltas.

Field identification & locations

Identify in the field by its gritty 'sandpaper' feel and visible grains. Often found in riverbeds, canyons, and coastal cliffs. This heart-shaped specimen is more valued for its unique shape than its mineral purity.