sedimentary
Sandstone (with Quartz Vein/Inclusion)
Arenite (primarily SiO2)
Hardness: 6-7 (Mohs scale), Color: tan, yellow, and brownish-grey, Luster: dull/earthy, Crystal structure: clastic (visible grains), Cleavage: none, Specific gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, and brownish-grey, Luster: dull/earthy, Crystal structure: clastic (visible grains), Cleavage: none, Specific gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in river beds, deserts, or marine environments. This specimen appears water-worn, suggesting transport in a river or stream.
Uses & applications
Used widely in construction as a building stone or road base; if pure silica, used in glassmaking. Small water-worn stones are often used in landscaping.
Geological facts
Sandstone constitutes about 20-25% of all sedimentary rocks on Earth. The visible white crystalline patch on the end is a quartz inclusion or small vein.
Field identification & locations
Look for a gritty texture like sandpaper and visible layering or bedding. Often found in outcrops or as cobbles in riverbeds and coastal areas.
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