sedimentary

Sandstone (Painted)

Arenite (primarily SiO2)

Hardness: 6-7 (Mohs scale); Color: Typically tan, brown, or yellow-tan; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Typically tan, brown, or yellow-tan
Luster: Dull/Earthy

Identified April 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Typically tan, brown, or yellow-tan; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments. This occurs in various environments such as deserts, river beds, or beaches through lithification over millions of years.

Uses & applications

Used widely in construction for building stone, pavers, and decorative landscaping. In industry, high-silica sandstone is used in glass making.

Geological facts

Sandstone makes up about 10-25% of the sedimentary rock on Earth. The 'painted' aspect of this specimen suggests it was used as a 'kindness rock' or garden marker, which is a common hobbyist use.

Field identification & locations

Identify in the field by its gritty, sandpaper-like feel and visible grains. It often shows bedding layers. It is found globally in sedimentary basins.