sedimentary
Sandstone pebble
Sandstone (Quartz-rich Arenite)
Hardness 6-7 on Mohs scale depending on cementation, yellowish-brown to tan color, dull to earthy luster, fine to medium-grained granular texture, gritty feel.
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Physical properties
Hardness 6-7 on Mohs scale depending on cementation, yellowish-brown to tan color, dull to earthy luster, fine to medium-grained granular texture, gritty feel.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral or rock particles (predominantly quartz and feldspar) in fluvial, lacustrine, or marine environments. Smooth rounded shape acquired via stream or wave action abrasion.
Uses & applications
Commonly used in construction, landscaping, road base, or as decorative garden stones.
Geological facts
River-worn sandstone pebbles often retain rounded oval shapes due to thousands of years of tumbling in natural waterways.
Field identification & locations
Identified by its gritty sandpaper-like texture and light brownish quartz composition. Extremely widespread in riverbeds, beaches, and sedimentary rock basins worldwide.
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