sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness 7 on Mohs scale, grayish-white to off-white, dull to vitreous luster, microcrystalline or massive aggregate, uneven to conchoidal fracture.
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Physical properties
Hardness 7 on Mohs scale, grayish-white to off-white, dull to vitreous luster, microcrystalline or massive aggregate, uneven to conchoidal fracture.
Formation & geological history
Formed through weather erosion and transport of quartz-rich igneous or metamorphic rocks into stream beds or sedimentary deposits.
Uses & applications
Commonly used in construction aggregate, landscaping, aquariums, or as general gravel.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and is exceptionally resistant to mechanical and chemical weathering.
Field identification & locations
Identified by its hardness (scratches glass), lack of distinct cleavage, and light neutral color. Extremely common worldwide in riverbeds, beaches, and soil.
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