sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, or gold; Luster: Dull to vitreous (sparkly quartz grains); Structure: Clastic/Granular; Cleavage: None; Specific Gravity: 2.2–2.8

Hardness: 6-7 Mohs
Color: Tan, brown, or gold
Luster: Dull to vitreous (sparkly quartz grains)

Identified April 10, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or gold; Luster: Dull to vitreous (sparkly quartz grains); Structure: Clastic/Granular; Cleavage: None; Specific Gravity: 2.2–2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains, typically quartz. This specimen appears weathered and may have undergone low-grade heat/pressure transitions toward quartzite.

Uses & applications

Used widely in construction as a building material, paving stones, and in the manufacturing of glass and abrasives.

Geological facts

Sandstone accounts for approximately 20% of all sedimentary rocks on Earth and is the primary reservoir for both groundwater and petroleum in many geographical regions.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible quartz grains. Often found in ancient riverbeds, deserts, or coastal beach deposits.