sedimentary

Sandstone Pebble

Arenite (typically SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (if quartz-rich); Color: Tan, yellow, or golden-brown; Luster: Dull or earthy; Crystal structure: Clastic (composed of grains); Cleavage: None; Specific Gravity: 2.2-2.8.

Hardness: 6-7 (if quartz-rich)
Color: Tan, yellow, or golden-brown
Luster: Dull or earthy

Identified July 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (if quartz-rich); Color: Tan, yellow, or golden-brown; Luster: Dull or earthy; Crystal structure: Clastic (composed of grains); 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. This specific specimen has been further shaped into a rounded pebble by water erosion in a river or beach environment.

Uses & applications

Large-scale sandstone is used in construction and sculpture. Small pebbles like this are often used in landscaping, aquariums, or as decorative garden stone.

Geological facts

Sandstone can preserve fossilized footprints and ripples from ancient currents. It is one of the most common sedimentary rocks on Earth and acts as a major reservoir for groundwater and oil.

Field identification & locations

Identify by its gritty, sand-like texture and visible grains. Often found in riverbeds, beaches, and desert environments. It will feel like sandpaper when rubbed.