sedimentary

Sandstone with Quartz/Calcite druse

Arenite with druse (SiO2 or CaCO3)

AI-generated identification · may be incorrect

Hardness: 6-7 (if quartz) or 3 (if calcite); Color: Tan, beige, reddish-brown; Luster: Dull to vitreous; Structure: Granular sedimentary with small crystal encrustations.

Hardness: 6-7 (if quartz) or 3 (if calcite)
Color: Tan, beige, reddish-brown
Luster: Dull to vitreous

Identified July 13, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (if quartz) or 3 (if calcite); Color: Tan, beige, reddish-brown; Luster: Dull to vitreous; Structure: Granular sedimentary with small crystal encrustations.

Formation & geological history

Formed by the cementation of sand-sized mineral particles or rock fragments, following burial and lithification. The crystalline layer (druse) formed later from mineral-rich fluids passing through cavities.

Uses & applications

Commonly used in construction as building stone, pavers, and crushed stone. Small druzy specimens are collected for their aesthetic crystalline texture.

Geological facts

Sandstone can be found in almost every environment where there is water, such as deserts, rivers, and oceans. The color is usually determined by the minerals that act as the cement, such as iron oxide.

Field identification & locations

Identify by the gritty sand-paper feel of the matrix and the presence of small, sparkling mineral points. Common in sedimentary basins and outcrops globally.