sedimentary
Sandstone Pebble
Sandstone (primarily Quartz, SiO2)
Hardness 6-7, tan to yellowish-brown weathered surface with exposed grey core, dull to earthy luster, granular sedimentary texture
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Physical properties
Hardness 6-7, tan to yellowish-brown weathered surface with exposed grey core, dull to earthy luster, granular sedimentary texture
Formation & geological history
Formed by the compaction and cementation of mineral particles or rock fragments, typically deposited in ancient riverbeds, beaches, or desert dunes over millions of years
Uses & applications
Commonly used in construction, landscaping, flagstones, and as a general building material
Geological facts
Sandstone represents about 10 to 20 percent of the Earth's sedimentary rocks and often preserves cross-bedding structures from ancient currents
Field identification & locations
Identified by its scratchy, sandpaper-like texture and distinct rounded river-worn shape; found worldwide along riverbeds, beaches, and sedimentary rock formations
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