sedimentary

Coarse Sand or Fine Gravel

Detrital Sedimentary Fragments (mostly SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale if quartz-based); Color: Tan, beige, or white; Luster: Dull to vitreous; Crystal structure: Usually microcrystalline or amorphous due to weathering; Cleavage: None

Hardness: 7 (Mohs scale if quartz-based)
Color: Tan, beige, or white
Luster: Dull to vitreous

Identified June 1, 2026More sedimentary →

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Physical properties

Hardness: 7 (Mohs scale if quartz-based); Color: Tan, beige, or white; Luster: Dull to vitreous; Crystal structure: Usually microcrystalline or amorphous due to weathering; Cleavage: None

Formation & geological history

Formed through the mechanical and chemical weathering of larger igneous or metamorphic rocks like granite. These are small fragments transported by water or wind and deposited as sediment.

Uses & applications

Used in the production of concrete, glass manufacturing, road construction, filtration systems, and as an abrasive.

Geological facts

Most sand is composed of silica (quartz). Over millions of years, these small grains can become compacted and cemented to form sandstone.

Field identification & locations

Identify by granular texture and lack of organic structure. Found globally in riverbeds, beaches, and deserts. In a home setting, these are often track-in debris or components of construction materials.